"Invalid color or line style." Error during plotting in Executable

Question

Onur 2023-6-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1987244-invalid-color-or-line-style-error-during-plotting-in-executable

评论： Onur 2023-6-23

采纳的回答： Steven Lord

在 MATLAB Online 中打开

I am trying to plot a figure with an executable created by "compiler.build.standaloneApplication".

The function I am using is;

function dummyFunction1(a,b)
plot([1 2],[a b]);
end

And the code for executable generation;

appFile = fullfile('D:\testFolder\dummyFunction1.m');
opts    = compiler.build.StandaloneApplicationOptions(appFile,'OutputDir','D:\testFolder');
results = compiler.build.standaloneApplication(opts);

Here is the problem;

Any help would be great.

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Answer 1

Steven Lord 2023-6-23

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https://ww2.mathworks.cn/matlabcentral/answers/1987244-invalid-color-or-line-style-error-during-plotting-in-executable#answer_1261334

Read the "Using a MATLAB File You Plan to Deploy" section on this documentation page. Inside your application as you've written it a and b are not the numbers 5 and 8 but the char arrays '5' and '8', and '58' is not a valid color or line style for the plot function (as the error message indicates.) You will need to convert them into numbers before using them in your call to plot.

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Steven Lord 2023-6-23

在 MATLAB Online 中打开

You probably want to use the isdeployed function to only convert from string to number in your deployed application, or use the ischar and/or isstring function to only convert if you receive text data as input. If given a number as input the str2double function will return NaN.

str2double(5)
ans = NaN
x = '5';
if ischar(x)
    fprintf("Input data is a char")
    x = str2double(x);
else
    fprintf("Input data is a number")
end
Input data is a char
class(x)
ans = 'double'
x = 8;
if ischar(x)
    fprintf("Input data is a char")
    x = str2double(x);
else
    fprintf("Input data is a number")
end
Input data is a number
class(x)
ans = 'double'