X Y Z Surface Plot Problem

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Bora Tek
Bora Tek 2012-4-20
Hello Friends,
I need your assistance about plotting x y z axis surface graphic
I have tunnel data on excel; Tunnel lenght, Temperature, Time
I want to show these datas on matlab
here is my datas
http://speedy.sh/sTARC/Matlab-icin.xlsx
Thank you so much

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Matt Tearle
Matt Tearle 2012-4-20
data = xlsread('filename.xlsx'); % read in everything (numeric)
t = data(1,2:end); % first row (except first element)
l = data(2:end,1); % first column (except first element)
temp = data(2:end,2:end); % actual data in the table
surf(t,l,temp) % make surface plot
  2 个评论
Bora Tek
Bora Tek 2012-4-20
Thank you so much Matt Tearle :)
I'm a rookie on matlab by the way :)
Matt Tearle
Matt Tearle 2012-4-20
Welcome. No problem, we all start somewhere :)
http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab

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更多回答（2 个）

Bora Tek
Bora Tek 2012-4-20
Thank you so much for your help Matt, This link will help me im sure :) I have one more question, can i change x axis position with y axis? if i can do that, do i have to change my excel data? i want to show my datas like this.
Here is the link : http://speedy.sh/A9vqW/heat-transfer-conduction-radiation-3dgraph-499px.png
Thank you
  1 个评论
Matt Tearle
Matt Tearle 2012-4-23
You mean exchange the x and y axes? Yes, just transpose your data matrix:
temp = data(2:end,2:end)';
surf(l,t,temp)

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Bora Tek
Bora Tek 2012-4-29
Hi Matt,
I changed the code as you said;
data = xlsread('sıcaklık100mw.xlsx');
t = data(1,2:end);
l = data(2:end,1);
temp = data(2:end,2:end);
surf(l,t,temp)
But i got this error message:
Error using surf (line 75)
Data dimensions must agree.
  1 个评论
Matt Tearle
Matt Tearle 2012-4-30
Note the transpose operator (') at the end of the command temp = data(2:end...
temp is a matrix with m rows and n columns. When making a surface plot, the m rows are taken to be the values at m y locations; the n columns are taken to be the values at n x locations. So when you do surf(x,y,temp), the x vector should have n elements, and y should have m elements. To switch x and y, you need to flip (transpose) the matrix *and* the x and y vectors in the surf command.

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