How to use two different scales on one same axis: logarithmic from 0.1 to 1 and linear from then on
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I'm trying to reproduce the graphic below. I've got all the data but I don't manage to set the x-axis scale to reproduce the same display: logarithmic scale from 0.1 - 1 and linear from 1-4
Currently using Matlab 2012.a
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Joan Sngl
2013-2-23
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Youssef Khmou
2013-2-23
ok great, you used semilogx ? same figure as original?
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Youssef Khmou
2013-2-23
hi, Joan
The well known functions for plotting data with logarithmic scales are :
semilogx,semilogy, and loglog for both x and y axis .
lets try a way out :
Suppose Y data has N elements
>>N=length(Y);
>>x=linspace(0.1,4,N); % Linear vector of N points from 0.1 to 4.
>>indx=find(x==1.00);
% Now make the first portion logarithmic
>>x(1:indx)=log10(x(1:indx)); % plot(x) has two parts Log +Lin
Try this generated x axis and see.......
2 个评论
Youssef Khmou
2013-2-23
Depending on the length N , indx may by "empty matrix" then try to find manually the position where x is approx 1 .
Joan Sngl
2013-2-23
Thanks for the replay but I'm afraid this is not what I'm looking for. I already have the set of data points (X and Y) but I don't manage to represent them like in the first figure where the AXIS scale goes logarithmic from 0.1 to 1 and linear from 1-4.
This is how it looks like using normal plot function:
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