want to change what data I am plotting by text name.

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Riley Duffens 2023-6-13

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评论： Riley Duffens 2023-6-13

I am needing to plot many things from a .mat file but do not want to copy and paste the same code 30 times. I am wanting to set a varible such as 'CylinderPressure' and call it later. This works for everything but plotting. How can I change the 'CylinderPressure' so whats in it (the varible in question) can be referenced in plotting. In the end I want to just change the var variable to change what I am plotting. I atached the code I want to modify. Any help would be greatly apreciated.

var = 'CylinderPressure';

hold on

load('march.mat', var)

plot(CylinderPressure)

load('Feb.mat', var)

plot(CylinderPressure)

title(var)

legend('march','feb')

hold off

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Answer 1

Stephen23 2023-6-13

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编辑：Stephen23 2023-6-13

在 MATLAB Online 中打开

Do NOT load directly into the workspace, always LOAD into an output variable (which is a scalar structure).

Then simply use this syntax:

https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html

var = 'CylinderPressure';
S1 = load('march.mat',var);
S2 = load('Feb.mat'  ,var);
V1 = S1.(var);
V2 = S2.(var);
hold on
plot(V1)
plot(V2)
title(var)
legend('march','feb')
hold off