MATLAB: Histogram plot isn’t shown properly.

histogramimage analysisimage processingMATLABmatlab function

When I am trying to plot the Histogram it looks like as shown below. If I try to scale the y axis as it is too high the variation in the lower values aren't seen. How to show a proper histogram plot so that the variation in the lower side can be also seen along with the highest point in the y axis? Kindly help

Best Answer

Can't change the characteristics of the image; any linear scaling of the axis will only change the numerical values, not the shape.

The usual "trick" for data which have a very large dynamic range is to use log scaling on one or both axes...

histogram(yourData)
hAx=gca; hAx.YScale='log';  % get axes handle; set y axis to logarithmic

Illustration...

x=logspace(0,6,1000).';
nexttile, histogram(x)
nexttile, histogram(x), hAx=gca;hAx.YScale='log';

produced:

The downside is you can't have identically zero on the axis (there is no free lunch).

Related Solutions

MATLAB: How to plot a histogram with a logarithmic X-axis

The ability to directly plot a histogram with a logarithmic x-axis is not available in MATLAB.

To work around this issue, use the HIST function to plot the histogram, and them use

set(gca,'xscale','log')

to set the x-axis scale to logarithmic.

MATLAB: How to rescale the y-axis of a histogram

One approach:

X = randn(1, 420);
[N,edges] = histcounts(X, 'Normalization', 'probability');
xbar = edges(1:numel(N)) + mean(diff(edges))/2;
figure
bar(xbar, N)
grid
yt = get(gca, 'YTick'); 
ytix = linspace(min(yt), max(yt), 10);
set(gca, 'YTick',ytix, 'YTickLabel',fix(ytix*200/max(yt)))

Experiment to get different results.

Best Answer

Related Solutions

MATLAB: How to plot a histogram with a logarithmic X-axis

MATLAB: How to rescale the y-axis of a histogram

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