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Why does histogram gives issues? I rephrased my question

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I have the following set of data:
Each set of fitness1, fitness2 and fitness3 has 100 independent elements. I want to plot its histogram such that the x-axis is logrithmic having values like 10^-2, 10^-3, 10^-4....and the y-axis shows us how many elements have that corresponding fitness values in each fitness? Say for example we have 10^-3 on axis, so how many values in each fitness1, fitness2 and fitness3 are there having values in the range of 10^-3. Likewise, if we have 10^-5 on x-axis, then how many values in side each fitness are there having this range of 10^-5 and so on. I tried the following but its not like the one in the attachment.
clear all
load 2sn35
load 2sn45
[~,edges1] = histcounts(log10(fitness2sn35));%[~,edges] = histcounts(log10(x));
[~,edges2] = histcounts(log10(fitness2sn45));
histogram([log10(fitness2sn35) log10(fitness2sn45)] )% histogram(log10(fitness2sn35))
I want a grpah like this, but I don't get like this?

Answers (2)

Steven Lord
Steven Lord on 16 Nov 2022
x = rand(1, 1e5)*1e-5;
ax = axes;
Specify bins edges with logarithmic spacing.
h = histogram(ax, x, 10.^(-10:-5));
Set the XScale property of the axes to 'log'. You need to do this after the call to histogram not before.
ax.XScale = 'log';
Sadiq Akbar
Sadiq Akbar on 17 Nov 2022
I wrote the code according to Steven as follows:
clear all
load 2sn35 %x = rand(1, 1e5)*1e-5;
load 2sn45 %x = rand(1, 1e5)*1e-5;
ax = axes;
%Specify bins edges with logarithmic spacing.
h = histogram(ax, x1, 10.^(-10:-5));
h = histogram(ax, x2, 10.^(-10:-5));
%Set the XScale property of the axes to 'log'. You need to do this after the call to histogram not before.
ax.XScale = 'log';
But it gives me an empty figure widow.

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Image Analyst
Image Analyst on 17 Nov 2022
See my collection of demos attached that put insets within larger axes.
Walter Roberson
Walter Roberson on 20 Nov 2022
If you have data that is not yet had the bins analyzed, then use histogram()
If you have counts for each bin then call bar(BINLOCATIONS, COUNTS)
Sadiq Akbar
Sadiq Akbar on 20 Nov 2022
Thank you very much dear Walter Roberson for your kind response. Each variable "one" has 100 different values. So if we show the x-axis as logrithmic and the y-axis will show count values from 1 to 100. Actually someone said to me use "histcounts" and "histogram" and then he gave me the above code, but I don't understand it and also it doesn't give me the graph like the one in the attachment. I don't understand what does histcounts does and what does histogram does? And why do we write [~,edges1] as output arguments in hiscounts but doesn't write some output arguments in histogram. Further, x-axis is also not logrithmic like 10^-1, 10^-2, 10^-3,.....10^-10 etc.

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