Saving and opening Matlab file

2020 4 12
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更新时间：2020 4 12
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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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the cyclist
the cyclist 2020-4-12
Can you upload the entire code you used to create the plot and save it? And then the code you used to open the file again, and try to recreate the plot? (Use the paper-clip icon to attache the files.)
clear
n = 100;
x = linspace(0,4,n);
y = linspace(0,4,n);
[X,Y]=meshgrid(x,y);
Z = 4-((X-2).^4 + (Y-2).^4)/4
mesh(X,Y,Z);
figure(1); clf;
surf(X,Y,Z)
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

1 个投票

"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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