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Read a 3D matrix from Excel file

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Behrad Ze
Behrad Ze 2022-1-28
评论： Behrad Ze 2022-1-28
I have an Excel file of multiple rows and columns. I want to plot the entire file as a 3D plot. The first row is X and the First column is Y. I have tried to read X,Y and Z with the below codes, but I faild.I want to insert this data into a 3D matrix, in which I could do some calculations on that and then plot it. How can I insert this Excel file into a 3D matrix? and How can I plot it? I have also attached the Excel file. Thanks
x=sample(1,2:22)
y=sample(2:102,1)
xSize=length(x);
ySize=length(y);
for i=1:xSize
for j=1:ySize
xP(i)=x(i);
yP(j)=y(j);
zP(i,j,j)=sample((i+1),(j+1))
end
end
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Behrad Ze
Behrad Ze 2022-1-28
编辑：Behrad Ze 2022-1-28
All the cells except the first row and the first column are my Z direction.I have actually 21*101 values for the Z direction.
Behrad Ze
Behrad Ze 2022-1-28
I am quite new to Matlab. I have plotted it using Origin,but I need to manipulate it using Matlab.I am not sure if it makes sense to use 3d matrix in this case.I have 21 X values, 101 Y values, and 21*101 Z values.I am really puzzled. What could the best option to store these values? Thank You

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采纳的回答

Voss
Voss 2022-1-28
Ran in:
I think a 2D matrix is the way to go, since you have one value for each (x,y) point.
Here are some ways you might visualize your data. All of these ways create a surface object:
sample = readmatrix('sample.csv');
x=sample(1,2:end);
y=sample(2:end,1);
data = sample(2:end,2:end);
figure();
surf(x,y,data);
colorbar();
Then the same surface viewed from above:
figure();
surf(x,y,data);
colorbar();
view([0 90]);
Another way to do the same thing:
figure();
pcolor(x,y,data);
colorbar();

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