NetCDF was created under contract with the Division of Atmospheric Sciences of the National. On the tic marks and fill I had more luck. de bestellen Sie CAD-Farbplots* unkompliziert und preiswert online mit Bestpreisgarantie. Below is a listing of the functions provided by the pyferret module at this time along with a brief description of the function. PPLUS label commands. section7_regression. PyFerret command syntax: quick-start notes - These notes identify ways in which Pyferret command syntax differs from or extends Ferret command syntax. The command help (pyferret) will give the. Google stars. Ferret supports collections of netCDF files that are regarded as a single netCDF data set. In fact most of what PlotPlus can do is available in ferret by following a ferret command (perhaps with /set to hold off making. DAYS1900TOYMDHMS (day1900) Converts Julian days since 1-Jan-1900 to values year, month, day, hour, minute, second. It does not function in other windows that have been opened with SET WINDOW/NEW. In simplest terms, PyFerret is Ferret encapsulated in Python. the default value of -1 puts the labelling at the bottom,left ppl. The TMAP GKS enhancements of Plotplus include modification and addition of several PPL commands, including: SHASET. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. The /XPIXELS and /YPIXELS options to the FRAME command in PyFerret allows one to specify the pixel size of raster-type (PNG, JPEG) saved images. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. The EXIT command given at the "PPL>" prompt returns control to Ferret. $ pyferret -nodisplay. Hi Frank, Thanks for posting back to the group with the answer. SAVE/OUTTYPE= overrides all other settings, for this SAVE command only. Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. A number of useful symbols are automatically defined whenever Ferret sets up a plot. co. Find Plot Plus stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. ymlUOËjÃ0 ¼ ô û Å =ŠRhC ¥ |) Š ‹½©…õbWî òñ•Œ 43;3» = èÌ [D+ 6 8rãyŽnlRQRQš¶ {‡Rf¾‰ÅÆ2öÐìš V¸ä)² –ß‹E«‘. BIN_INDEX_WT (INDEX, WT, INDMAX) Returns data sorted into bins along an X axis. The opacity given by this option will be used even if a color definition includes an opacity. PLplot is a cross-platform software package for creating scientific plots whose plot symbols and text are limited in practice only by what Unicode-aware system fonts. kandi ratings - Low support, No Bugs, No Vulnerabilities. EOF_STAT (A,FRAC_TIMESER) Used with EOF_SPACE and/or EOF_TFUNC. PyFerret/Ferret v7. To see the script's description:PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. LGPL 3. Below is an annotated version of the script palette_demo. 8 CURVILINEAR COORDINATE DATA. @font selects "font" as the character or symbol font to. Click to expand. getServer(); CreatureSpawnEvent event = new CreatureSpawnEvent ( entity, spawnReason); craftServer. Beginning with Ferret v6. Hi Jens-Olaf, Try this demo ! define a 3-d variable def axis/x=1:10:1 xax ; def axis/y=1:10:1 yax ; def axis/depth/z=1:5:1 zax def grid/x=xax/y=yax/z=zax grd ; let v. Readme Activity. You can contact the company at 011 952 9900. Ferret v6. This can be done with the plotplus command "conset" ppl conset hgt,nsig,. 10. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. See the chapter "Customizing Plots" for. gif" extension; Ferret will automatically sense this as a request to create a GIF-formatted image file. If XCAT is called with string arguments, Ferret runs XCAT_STR. There are a number of hard limits and settings in the Ferret code: the number of variables that may be defined, the number of datasets open at a time, the length of certain strings, etc. Font changes (of the form @XX) can be imbedded in any label string (e. For example, a plot of NO3 burden versus latitude could be produced with the command. PLOT/ SYMBOL=DOT. You’ll find great deals for every budget on brands you. 09 - 17 Uhr Matplot++ is a graphics library for data visualization that provides interactive plotting, means for exporting plots in high-quality formats for scientific publications, a compact syntax consistent with similar libraries, dozens of plot categories with specialized algorithms, multiple coding styles, and supports generic backends. plotplus. CANCEL/LIST/OUTTYPE will restore the default behavior. Python scripts can be immediately accessed and used as Ferret external. - Fr. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. section9_comana. STATISTICS/ BRIEF. #. All qualifiers and restrictions are defined in the documentation for CONTOUR/FILL. 1 /LEVELS qualifier . XCAT_STR (sA, sB) concatenates string variables in the X direction. Here is an annotated example similar to frequency_histogram2. Plotplus bietet höchste Qualität in den Bereichen CAD-Plot, Posterdruck, Plan Scanservice und DigiTarlton Electric & Clothing is working in Household appliances and goods, Electronic stores activities. 2] is a vector of 5 points from 0. Last modified: Wed, 03/13/2019 - 15:41. gitignore","path. In general the FRAME command is more flexible and we recommend its use rather than this qualifier. LANCZOS (A, F1, F2, N ) Returns the argument, bandpass-filtered in time using a Lanczos filter. Ferret/Plotplus will write the coordinates of the symbol to a file called fort. PlotPlus-1. See the chapter "Computing Environment,". plotplus ist ein Familienunternehmen, das seit mehr als 70 Jahren im Dienste von Entwicklern, Fachleuten, Architekten, Planern und Ingenieuren steht. The command help (pyferret). This work is largely based on the SimPlot Arduino library authored by my friend jantje who is also the author of Sloeber, the best IDE for Arduino out there! Once upon a time, there was SimPlot, a plotting tool working side by side with a plotting library available for many platforms, including Arduino. note that starting with Ferret v6. Detailed control is possible over most aspects of Ferret graphical outputs. where <file> is the name of the output file. Therefore it is best to use explicit limits on any of the arguments rather than a SET REGION command. ! SAMPLEI, SAMPLEJ, SAMPLEK, SAMPLEL to sample data at a list of indices. The pyferret module provides Python functions so Python users can easily take advantage of the Ferret's abilities to retrieve, manipulate, visualize, and save data. de ist ein Online-Shop für Plot-, Print- und Scan-Dienstleistungen in verschiedenen Formaten und Preisen. Ferret supports "immediate mode" mathematical expressions‚ that is, numerical expressions that may be embedded anywhere within a command line. 6. Two interpolation techniques are available for gridding. Hi Pam, It looks like you need to access the PlotPlus users manual to answer a number of your questions. 5. Commands: /pp : To see the version. The following set of examples illustrates these procedures:EOF_STAT and EOFSVD_STAT. Previous Next. This existing variable may be a file variable or a user-defined variable. The PATTERN command sets the patterns to be used in a plot generated with the SHADE, FILL and POLYGON commands. Hi Muyin, You probably noticed an exchange about reversing time axis in the mail archives quite a while back. 2 CREATING AN HDF MOVIE. To: Gary Strand <strandwg@xxxxxxxx>; Subject: Re: Plotting a constant line on a time series plot; From: Mick Spillane <spillane@xxxxxxxxxxxxx>; Date: Fri, 5 Jan 2001 09:47:17 -0800 (PST) STATISTICS /D=. GLOSSARY. Ferret support policy outlines the support available to users and sources of information. The opacity given by this option will be used even if a color definition includes an opacity. jnl", etc. Visualizations of polygonal data is best handled with the POLYGON command. Installing or Building PyFerret. All conventions named in that. 3 REGIONS. RECT_TO_CURV (V, lon_bounds_out, lat_bounds_out, missing_allowed) Uses Bilinear Interpolation to regrid data on a recilinear grid to a curvilinear grid. 1 inches. Hi Brent, There is a plotplus command that controls the labelling interval of the two parts of the time axis labels ppl txlint low_int,hi_int that will I think help you out. 5. Arguments: V. > Your use of the "ppl tics" command is not in accordance with > the Plotplus manual. Home > Documentation > PyFerret > PyFerret Downloads & Installation. Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. Variable on the source rectilinear grid. The ability to define new variables lies at the heart of the computational power that Ferret provides. GO files are files containing Ferret commands. No packages published . za. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. The Users Guide has an index and table of contents. The types are the NetCDF types DOUBLE, FLOAT, INT, SHORT, and BYTE. Then you can either do the integration right away on that variable, or perhaps write the new variable to a netcdf file if it would simplify other tasks. Ihr Online-Shop richtet sich an. This is the fastest way to create an image from PyFerret (although, again, it is still somewhat slower than Ferret using XGKS). 3. 2 NETCDF DATA. Thus the sum of the values of a given EOF = sqrt (eigenvalue), and the mean of a given TAF = 1. 7. > ferret -secure. Search form. The vector is oriented in the X direction. 2 to 1 at a regular spacing of 0. de bieten wir Ihnen S/W- und Farbplots ebenso wie Schnittmuster-Plots. 6. Your system manager should customize the script at your site to permit your specification of the actual printers you have as output devices. > > Alternatively, for a quick look at how altering other > properties of the plot can improve the situation try inserting the > plotplus command "ppl. # Then execute (source) it (as below) from your . Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. jnl. Specifies the default data set to be used when computing statistics about the expression (s). When Ferret is started up, only one pattern is set, SOLID. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. This allows for easy generation. creates a line plot of a Lagrangian variable where the zero line of. They can be executed with the command "GO filename". They are defined via a descriptor file, in the style of TMAP-formatted data sets. The Kingfisher Liq Maps. Command qualifiers for EXIT: EXIT/ LOOP. These will generally be the fonts available on your system where PyFerret is running. The first of these controls the size of the numerical values on the axes. netCDFwas created under contract with the Division of Atmospheric Sciences of the. AXIS. E. > Is there a way in Ferret to gain access to the global "title" attribute? Yes, it is in the PlotPlus symbol LABTIT (use "ppl listsym") and you can get at it using. Try the Unix command "Fpalette '*'" to see a list of available palette files. xml /APPEND /CLOBBER. Those arguments in fact tell Ferret to internally choose one of a set of ordinary functions depending on the. 5. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. SAVE/OUTTYPE= overrides all other settings, for this SAVE command only. Note: HDF movies are discontinued with Ferret v6. 2017-04-22. The syntax of the IF-THEN logic is simply (by example) LET a = IF a1 GT b THEN a1 ELSE a2. Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. In Plotplus there are "scripts", called . The RD command reads the data. 8. 3 AXES. , 2011; Ndung'u and Weiss, 2012; Picker et al. In Chapter 9 of the NetCDF CF Conventions document, a set of file types for "Discrete Sampling Geometries" is defined. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. Now compatible with PlotMe 0. Lists the results with the stated precision, 1 through 16. BigShuiTai/plotplus-develop 4 commits. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. Labeling details with arrows and text. 1 OVERVIEW. CROSS Controls drawing of lines through the point x=0, y=0 on graph. 13. Arduino可以方便地操作傳感器獲得傳感器數據，獲取數據之後我們比較關心的是數據可視化Arduino自帶有串口監視器和串口繪圖器，我還找到了其他3種適合於arduino串口數據繪圖的工具，這篇博客也當做個記錄，分別介紹這4種繪圖方法，傳感器數據是上. ANNOTATE may only be given when a plot has been drawn. When using /SET_UP, follow the PPL CONTOUR (or PPL FILL) command with a CONTOUR/OVERLAY command to draw contour lines on the plot. Last modified: Mon, 04/22/2019 - 09:55. 0 stars Watchers. Created 6 commits in 2 repositories. The /OUTFILE, /APPEND /CLOBBER qualifiers allow for this output to be written to a file. Hi Andrea, > Does anyone know how can I increase the font of the values in contour maps? I take it that you wish to increase the size/height of the contour labels. Results are on the x-axis j = 1: number of EOFs computed and scaled, j = 2: percentage of total variance accounted for by each eigenvector, j = 3: the. section8_eof. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. You should find it in the font tables of the plotplus manual. 3. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. Ferret color controls for lines. LABEL /NOUSER. Plotplus has a series of commands to control this axis to customize beyond the defaults that are provided. Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. Specifies the default data set to be used when computing statistics about the expression (s). "centered. Unlike traditional Ferret external functions written in Python, there is no automatic scanning and importing. PlotPlus computer files should be submitted to the FOCI Coordinator. mk. For example, a plot of NO3 burden versus latitude could be produced with the command. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. ) When you create a plot with multiple data lines, Ferret automatically draws each line in a different color. It is currently supported only by special request to the Ferret developers. Documentation section, including release notes, this manual which is updated. CAD Plots auf »plotplus. 看完这章之后对这个 from…import * 语句与 import 区别很是疑惑从别处看完解释理解如下。. land_detail. 3. Note: This is a grid-changing function. ORG. 1. IF-THEN-ELSE logic for masking. de. NetCDF allows the creation of data sets that are self-describing and network-transparent. 2. ÑÀg m©×Jâ1_Ø äçîí :bo¥&Éëo_m2°My ÞO ¾ ²õ Fø!Ì 1Ä qa¨{i5Dï‹*F+(ï¼ì ÐY ’RšR &oz> KÍ}J— . Last modified: Mon, 04/03/2017 - 17:31. 3. 13. 7 SIGMA COORDINATE DATA. To: Gary Strand <strandwg@xxxxxxxx>; Subject: Re: Plotting a constant line on a time series plot; From: Mick Spillane <spillane@xxxxxxxxxxxxx>; Date: Fri, 5 Jan 2001 09:47:17 -0800 (PST) Cc: Ferret Users Mailing List <ferret_users@xxxxxxxxxxxxxxxxxxx> In-reply-to:. The HERSHEY font which draws letters exactly as is done in Ferret, is currently the default. The collection of annotations is made up of three plotplus movable labels,always labels 1, 2 and 3. Then CANCEL ATT/OUTPUT so that the history attribute is not written for variable sst2. Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. Introduction. 9. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. 2, when defining a Forecast Model Run Collection (FMRC) aggregation, a change is made to the time/forecast definitions. One addition to Mick's excellent reply, just a note that the ppl commands are all documented in this on-line document:. Here is a demo - cut and paste it into a ferret session to see how it works. 2. The FILE command is an alias for SET DATA/EZ. 63 includes further support for Discrete Sampling Geometries datasets. When using /SET_UP, follow the PPL CONTOUR (or PPL FILL) command with a CONTOUR/OVERLAY command to draw contour lines on the plot. 6. 6. 775. of App. ORIGIN Sets distance of plot origin from lower left corner of the box. FRAME /XPIXELS= /YPIXELS=. Wenn Sie der Meinung sind, dass dies nichts für Sie ist, können Sie auch andere gutscheins auf gutschein-de. The argument is the name of a palette file. 0%; FooterFor more control, use the PlotPlus command called "SHAKEY" which controls the size, position,etc. PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. Images can be saved at any time in vector image formats (such as PostScript, PDF, or SVG) or in the PNG raster image format. 85, CANCEL ATTRIBUTE may be applied to user-defined variables. With this plugin you can change time and weather on your PlotMe plot. The result is the count. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. Logical operators with strings. 10 SYMBOL EDITING. Run these from Ferret with "GO coads_demo", etc. ferret startup file or a settings script run at startup. Met. For example: ! Set up your plot PLOT/SET_UP/I=1:100 SIN(I/6) ! Remove label 1, the FERRET version number GO unlabel 1 !7. , 18, 1016-1022. The new variable will have attributes such as units and title automatically defined from the existing one. 1736. View code README. jnl. National Oceanic and Atmospheric Administration United States Department of Commerce. The mapping is applied to data with the function CURV_TO_RECT which interpolates the data to the rectilinear grid. 4) additional symbols are defined, and are referenced using PLOT/SYMBOL=name. This is called the Ferret journal file. admin: Bypass plot owner verification (You can use it on other's plots) - plotplus. ipynb . 2) SET DATA/FORMAT=cdf. As you continue your tour, you'll see exactly the commands that control Ferret. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. Search PMEL1. Ferret Tour; DSG files: Discrete Sampling Geometries Demo; External Function Examples. To invoke symbol substitution‚ the replacement of the symbol name with its (text) value‚ within a Ferret command. PyFerret for the Python user - Example PyFerret session as a Python user. 0 for horizontal, 1 for vertical (0)The Z structures of the profiles are blended into a single Z axis by a choice of techniques. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. 2) with qualifiers to the command name (slash-delimited) 3) with qualifiers to variable names (in square brackets, comma-delimited) If SET REGION is. This tour will introduce the basic capabilities of the FERRET program through examples. Many palettes are included in the Ferret distribution. nc. This standard is a set of conventions adopted in order to promote the interchange and sharing of files created with the netCDF Application Programmer Interface (API). 3 EMBEDDED EXPRESSIONS. jnl, taking definitions made by a call to the script variance. To: Mick Spillane <spillane@xxxxxxxxxxxxx>; Subject: Re: Labels on right axis of PLOT plot, and "go black"; From: Ansley Manke <ansley@xxxxxxxxxxxxx>; Date: Wed, 24 Jul 2002 10:11:25 -0700; Cc: Gary Strand <strandwg@xxxxxxxx>, Ferret Users Mailing List <ferret_users@xxxxxxxxxxxxxxxxxxx> References:. BigShuiTai has 13 repositories available. The SKP command names the data file and skips past the 5 header records at the beginning of the data file. IF-THEN-ELSE logic for masking. USE. This is precisely analogous to method 3 of handling collections of profiles. deplotplus. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. 9. CAD Plots sind großformatige Drucke, zum Beispiel Baupläne, Grundrisse, technische Zeichnungen, TGA Zeichungen, Konsturuktionspläne, Schnittmuster. Join our team. jnl). Symbols may be edited and checked using the same controls that apply to journal file arguments. These axis features can be modified or suppressed using the following Ferret direct controls and PPLUS commands. By "curvilinear coordinate data" we refer to data which is curvilinear in the XY plane there. Download Source Code. This work is largely based on the SimPlot Arduino library authored by my friend jantje who is also the author of Sloeber, the best IDE for Arduino out there! Once upon a. copy pass_thru. 5. SHADE/ FRAME. The /NOLABELS qualifier suppresses the plot title, the documentation and signature, and the axis labels of. 4 FERRET PROGRAM LIMITS. There are three scripts: creates a line following the Lagrangian track with color varying according to a Lagrangian variable. 10. Plotting library compatible with Sloeber IDE and SimPlot The Sloeber Eclipse Plugin provides a 6 channels plotter interface base on the SimPlot packet format: this. The Kingfisher Liq Maps. Here's what you need to do to create the new function: 1. 8. 85, if you include -A in the second argument to this function, then the command will be sent to NCO with -A and not -O. ). In PyFerret, the /OPACITY qualifier can be used to specify the opacity (alpha channel value) of the colors used in the plot. Using the pyferret. Creating a CDL file with Ferret. If a value is not specified Ferret chooses a value appropriate to the viewport size. login file the Unix C-shell command. e. These labels may be removed using the "unlabel. "Gridded data sets" in the Ferret environment may be multi-dimensional model outputs,. 1. To avoid to clutter too much the serial console, which is commonly also used for debugging purposes, and in order to reduce to the bare minimum the size of the. 0 if the key will not be displayed, 1 if it will (0) orient. 0. Locates labels in inches instead of user units (xpos and ypos are specified in inches rather than in world coordinates). PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. 4 DEFINING NEW VARIABLES. wrc. In commands themselves, square brackets modify a variable with information about the context (e. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. These plots will be published, as is, in the annual Field Operations Report. gitignore","path. Packages marked with an asterisk(*) are provided by outside parties. FFT_INVERSE (AR, AI) computes the inverse Fast Fourier Transform of the two frequency series AR and AI. 3 COMMON COMMANDS. PlotPlus . 0. Ferret sorting demo (1) Ferret sorting demo (2) Fast Fourier Transforms. There are three steps required to convert data to netCDF if your data is not already readable by Ferret: 1. de« in schwarz-weiß & Farbe freie Formatwahl Pläne plotten & falten lassen Expressdruck Jetzt online bestellen! Menü 0800 552 00 00 0800 552 00 00 . FFT_RE and FFT_IM assume f (1)=f (N+1), and the user gives the routines the first N pts. Languages. NetCDFallows the creation of data sets which are self-describing and platform-independent. do_key. Bestellungen, die bis 13 Uhr eingehen, werden am selben Arbeitstag. Such data sets are referred to as "MC" (multi CDF) data sets. LANCZOS. Destination grid longitudes, in degrees (2-D field of longitudes describing the curvilinear grid)PLOTPLUS HISTORY, EVOLUTION; ENHANCED COMMANDS DESCRIPTION; GKS LINE BUNDLES; HARD COPY; Previous Release Notes; Tutorials and Demos. 2 GO tools . (read from disk files or remote URLs) 2) user-defined variables. See Chapter 9 of the CF standard for the details. Ferret is an interactive computer visualization and analysis environment designed to meet the needs of oceanographers and meteorologists analyzing large and complex gridded data sets. so) files and are dynamically linked to Ferret at run time. Hi Gaorz, Not all fonts have every character and the percent sign is one that is frequently missing. These are given via the symbol number, i. co. 04 packages have successfully been used on other "free" Linux systems that use Python2. In many cases this is an adequate representation. This computation uses a spherical interpolation code written at GFDL; the. The GO command understands a. jnl" script after setting up your plot. 6. The data sets should be accessible simply by typing the Ferret command. SUBSTRING (string1, offset, len) STRCAT (string1, str2) STRFLOAT (string1) FLOATSTR (var, FMT) LABWID (string, charsize) SPAWN command. The syntax of the IF-THEN logic is simply (by example) LET a = IF a1 GT b THEN a1 ELSE a2. from…import ：导入了一个模块中的一个函数；注.