Saving and opening Matlab file

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Jonas Grov Andersen
编辑： per isakson 2020-4-12
Hi. I'm new to matlab. I was trying out how to plot and wanted to save the file for later. I named it 2D_Plot_Example.mat and saved it to a folder on my desktop.
Later i tried opening the file again in editor and everything i wrote is there. Except the plot dosen't show up and the colours isn't there.
(Example: Hold (on), Hold (off), ('r--'), (':'), and so on.
It's like everything is just text and not a code.
Do anyone know what i did wrong? Thanks! :)
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Jonas Grov Andersen
Jonas Grov Andersen 2020-4-12
Maybe i should save them as .m instead of .mat?

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per isakson
per isakson 2020-4-12
编辑：per isakson 2020-4-12
"Except the plot dosen't show" Matlab doesn't recognise it as Matlab code.
The extension, .mat, indicates data. See Save and Load Workspace Variables
Ordinary Matlab m-code is stored in files with the extension, .m, (I didn't find a good reference.)
2D_Plot_Example is not a legal name for a file with m-code; first character shall be a letter (English) or underscore(?)
Conclusion: Save the code under the name TwoD_Plot_Example.m

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