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Plotting 2D Contour plot via python

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T O P I C R E V I E W
OriginUser_FS	Posted - 01/31/2023 : 07:59:35 AM Origin Ver. and Service Release (Select Help-->About Origin): 2022 Operating System: Windows 10 Hello everyone, i have a question to the use of python outside of origin to plot 2D contour plots. I saw in this entry (https://www.originlab.com/doc/python/Examples/Graphing) that it is possible to plot a contour plot using xyz coordinates. Is it also possible to plot it via a virtual matrix like it is in the origin application itself? (so via the plotvm) I am having a lower number of x coordinates, than i am having of y and z, which would make the use of the virtual matrix very practical. Thanks in advance and best regards FS
5 L A T E S T R E P L I E S (Newest First)
YimingChen	Posted - 02/02/2023 : 09:47:44 AM What object did you create with LT? Do you mean the window object like layer, axis, etc? Or do you mean graph object? Please check the two pages below: https://www.originlab.com/doc/LabTalk/ref/Visual-objs-Created-by-Origin-obj https://www.originlab.com/doc/LabTalk/ref/Graphic-objs Regarding the script to export worksheet to csv, can you try below? op.lt_exec(r'expASC path:="c:\signal.csv";') James
OriginUser_FS	Posted - 02/02/2023 : 04:42:52 AM sorry for the odd question, but i am not so familiar with labtalk, but how do i access the graph object i created with the labtalk command? To then execute the methods, to manipulate the graph, you also referred to. The only thing it is returning is a bool, and i couldnt find another labtalk command to assign it to a variable. Furthermore i tried to export a worksheet as a csv file with op.lt_exec("expASC path:="c:\signal.csv";") and i am getting an Syntax error for "C:" at this stage. Im not quite sure why this happens, because i just took the command line as it was written here: https://www.originlab.com/doc/en/X-Function/ref/expASC BR FS
YimingChen	Posted - 02/01/2023 : 09:01:19 AM Please check the Python reference page below: https://docs.originlab.com/originpro/classoriginpro_1_1graph_1_1GLayer.html#ade5e9d47cf32ffa00ac59728605ea04e https://docs.originlab.com/originpro/classoriginpro_1_1graph_1_1Plot.html#a7545ca68323d5cf9ce8de84edfcb478f James
OriginUser_FS	Posted - 02/01/2023 : 04:45:55 AM Thank you very much, helped me a lot. I didnt find any argument to set the ranges of the x, y or z values displayed. There is sth called rowrng however this selects, as i got it, only the x/y row if we did not specify it in rowpos. Is there anything i overlooked, or is there maybe another function to do that? BR FS
YimingChen	Posted - 01/31/2023 : 3:28:51 PM plotvm is actually an X-function so the add_plot method in Python won't work. You can call X-function from Python though. Please activate the worksheet of your data, and run the Python script below: op.lt_exec("plotvm rowpos:=none colpos:=none ogl:=<new template:=contour>;") James

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