how can i compare 3 different columns of an Excel sheet with contourf plot in Matlab GUI
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Darshil Pragneshbhai Trivedi
el 22 de Dic. de 2021
Editada: Cris LaPierre
el 12 de En. de 2022
Hello all, nowadays i am making a GUI through matlab designer to compare different parameters, i have to compare 3 different columns of Excel sheet with contourf plot. And I am getting error of 'Error using contourf (line 57) Z must be at least a 2x2 matrix.'
Thank you all in advance, please help me out, i am stucked with my task.
here is my code:
Parameter = readmatrix('GUI1.xlsx');
Parameter1 = Parameter(51*1);
Parameter2 = Parameter(51*2);
Parameter3 = Parameter(51*3);
Parameter4 = Parameter(51*4);
if (strcmp(app.XAchseParameterDropDown.Value,'DE'))
X = Parameter1;
elseif (strcmp(app.XAchseParameterDropDown.Value,'DI'))
X = Parameter2;
elseif (strcmp(app.XAchseParameterDropDown.Value,'DrE'))
X = Parameter3;
else
X = Parameter4;
end
if (strcmp(app.YAchseParameterDropDown.Value,'DE'))
Y = Parameter1;
elseif (strcmp(app.YAchseParameterDropDown.Value,'DI'))
Y = Parameter2;
elseif (strcmp(app.YAchseParameterDropDown.Value,'DrE'))
Y = Parameter3;
else
Y = Parameter4;
end
if (strcmp(app.ZAchseParameterDropDown.Value,'DE'))
Z = Parameter1;
elseif (strcmp(app.ZAchseParameterDropDown.Value,'DI'))
Z = Parameter2;
elseif (strcmp(app.ZAchseParameterDropDown.Value,'DrE'))
Z = Parameter3;
else
Z = Parameter4;
end
contourf(app.UIAxes,X,Y,Z)
1 comentario
Voss
el 22 de Dic. de 2021
Can you attach the relevant Excel file (which is called 'GUI1.xlsx' in this code)?
Respuestas (1)
Cris LaPierre
el 24 de Dic. de 2021
Editada: Cris LaPierre
el 24 de Dic. de 2021
A contour plot is created from a matrix (Z data; see here). You must be giving it a vector, causing the error message you see.
% Works
x = -2:0.2:2;
y = -2:0.2:3;
[X,Y] = meshgrid(x,y);
Z = X.*exp(-X.^2-Y.^2);
contourf(X,Y,Z,'ShowText','on')
% recreates the error you are seeing
x = -2:0.2:2;
y = -2:0.2:3;
[X,Y] = meshgrid(x,y);
Z = X.*exp(-X.^2-Y.^2);
contourf(X,Y,Z(:),'ShowText','on')
How you convert your column data to a matrix is going to depend on your data. It's very difficult to answer that question withough more information.
2 comentarios
Cris LaPierre
el 12 de En. de 2022
Editada: Cris LaPierre
el 12 de En. de 2022
I think you'd have to tell us that. I'm not sure how we would know.
Generally speaking, your X and Y values will be inputs (independent variables) and Z will be your output or response (dependent variable).
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