Problem using imagesc plot for non uniform values

Question

Abhik Saha 2020-10-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/605008-problem-using-imagesc-plot-for-non-uniform-values

回答： Maju Kuriakose 2023-5-30

I have to plot the imagesc using matlab. Where in the y array I have 16 different points for which x values are same, and the z values are different in each points and then for the next 16 different points for y array is same as the above y array but now x values are change compare to the previous x array and it is constant upto next 16 data points. The process continues for 320 data sets. How do I plot this using imagesc?

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KSSV 2020-10-5

What problem you have to plot? Show us the data. You can use pcolor also.

Abhik Saha 2020-10-5

data_analysis.txt

Please see the data file where I need to plot (1,2,3) and plot (1,2,4) lines

where 1,2,3,4 are the columns in the data file

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Answer 1

KSSV 2020-10-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/605008-problem-using-imagesc-plot-for-non-uniform-values#answer_505105

在 MATLAB Online 中打开

data = importdata("data_analysis.txt") ; 
x = data(:,1) ; y = data(:,2) ; 
z1 = data(:,3) ; z2 = data(:,4) ; 
% Use interpolation 
xi = linspace(min(x),max(x),300) ; 
yi = linspace(min(y),max(y),300) ; 
[X,Y] = meshgrid(xi,yi) ;
Z1 = griddata(x,y,z1,X,Y) ; 
pcolor(X,Y,Z1)
shading interp 