How can I draw a 3D Free Energy Diagram from a text file which has 3 columns?

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Ankita 2013-10-28

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回答： suhani nagpal 2013-12-16

free-energy-landscape.txt

Apologies if the questions of this type have been already asked but I am a complete novice in MATLAB and am seeking help to draw a free energy diagram from a text file which looks like the following: (I have also attached the file) ------------------------------------------------------------------------------ 4.20766 0.13450 15.50000 4.21207 0.13450 15.50000 4.21647 0.13450 15.50000 4.22088 0.13450 14.20000 4.22528 0.13450 11.60000 4.22968 0.13450 12.90000 4.23409 0.13450 14.20000 4.23849 0.13450 15.50000 4.24289 0.13450 15.50000 ------------------------------------------------------------------------------------ There are 16000 rows and 3 columns. The first two are my parameters and third column is the free energy value. I want to plot this data and visualize as a 3D Free energy diagram. As I am novice, I might need a detailed help please.

Kind regards

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sixwwwwww 2013-10-28

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Dear Ankita, you can plot 3 columns of equal length as follows:

ID = fopen('filename.txt');
data = textscan(ID, '%f%f%f');
fclose(ID);
min(data{1})
max(data{1})
plot3(data{1}, data{2}, data{3}, '*-'), xlabel('x'), ylabel('y'), zlabel('Free energy')