How to assign new variables?

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Devendra 2024-4-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2106451-how-to-assign-new-variables

编辑： Walter Roberson 2024-4-14

采纳的回答： Konstantinos

在 MATLAB Online 中打开

I am using following lines of matlab code to assign new variables to print on plot.

if(dependent_vars{jj} == 'act_y_ha') 
    par = 'act\_y\_ha'
end
if(dependent_vars{jj} == 'act_per_ha') 
    par = 'act\_per\_ha'
end

This code is giving following error

par = 'act\_y\_ha'

Arrays have incompatible sizes for this operation.

Error in ds_reg (line 69)

if(dependent_vars{jj} == 'act_per_ha')

I request you to kindly suggest me to fix the error.

Devendra

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采纳的回答

Konstantinos 2024-4-13

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https://ww2.mathworks.cn/matlabcentral/answers/2106451-how-to-assign-new-variables#answer_1440736

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The error you're encountering, "Arrays have incompatible sizes for this operation," suggests that the comparison operation == between the string 'act_per_ha' and the cell array element dependent_vars{jj} is causing an issue due to incompatible sizes or types.

To fix this error, you can use the strcmp function to compare strings in MATLAB. Here's the corrected code:

if strcmp(dependent_vars{jj}, 'act_y_ha')
    par = 'act\_y\_ha';
end
if strcmp(dependent_vars{jj}, 'act_per_ha')
    par = 'act\_per\_ha';
end

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Devendra 2024-4-13

Thank you very much for your help, Devendra

Star Strider 2024-4-13

@Devendra — See: Answer

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更多回答（1 个）

Star Strider 2024-4-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2106451-how-to-assign-new-variables#answer_1440741

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Use the strrep function instead of the if block —

jj = 1;
dependent_vars{jj} = 'act_per_ha';
jj = 2;
dependent_vars{jj} = 'act_per_ha';
jj = 3;
dependent_vars{jj} = 'line with no underscores';
for jj = 1:numel(dependent_vars)
    dependent_vars{jj} = strrep(dependent_vars{jj}, '_', '\_');
end
dependent_vars{:}
ans = 'act\_per\_ha'
ans = 'act\_per\_ha'
ans = 'line with no underscores'