# How do plot rows of your matrix into a histogram?

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Dameon Solestro on 25 Nov 2021
Answered: Image Analyst on 25 Nov 2021
So usually hist allows you to plot the columns of your matrix into a histogram. i wish to plot the rows. Below is my matrix.
my first column is my ordinal information (so its not counted in the histogram). I also wish to plot for every 2 rows. Is that possible??
0 0.0032 0.0032 0.0032
1.0000 0.0010 0.0028 0.0016
2.0000 0.0012 0.0001 0.0013
3.0000 0.0000 0.0009 0.0025
4.0000 0.0006 0.0000 0.0012
5.0000 0.0006 0.0021 0.0002
6.0000 0.0003 0.0000 0.0003
7.0000 0.0019 0.0016 0.0001

Image Analyst on 25 Nov 2021
Not sure what you mean by histogram. Is that your data or some kind of histogram of the data?
Anyway, to plot the rows of your matrix, row-by-row, you can do this:
m=[
0 0.0032 0.0032 0.0032
1.0000 0.0010 0.0028 0.0016
2.0000 0.0012 0.0001 0.0013
3.0000 0.0000 0.0009 0.0025
4.0000 0.0006 0.0000 0.0012
5.0000 0.0006 0.0021 0.0002
6.0000 0.0003 0.0000 0.0003
7.0000 0.0019 0.0016 0.0001];
[rows, columns] = size(m)
rows = 8
columns = 4
for row = 1 : rows
plot(m(row, 2:end), '.-', 'LineWidth', 3, 'MarkerSize', 40)
hold on;
legendStrings{row} = num2str(row);
end
legend(legendStrings)
grid on;
fontSize = 15;
title('m', 'FontSize', fontSize)
xlabel('x', 'FontSize',fontSize)
ylabel('y', 'FontSize',fontSize)