convert time & calculate performance

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I need to represent the performance of multple programs by time elapsed vs size.But I don't know how to convert time I got. Also is my way correct to represent my Data ?
I will appricated any help.
X=[ '0m45.364s','0m45.097s','0m46.984s','0m44.962s','1m29.656s']; % this is time elapsed
Y = [200,400,600,800,1000,1200,1400,1600,1800,2000]; % the size
hold on % allow all vectors to be plotted in same
% figure
plot(t, X, 'blue', t, Y, 'red', t, Z, 'green')
title('Row versus column ') % title
ylabel('Matrics size') % label for y axis
xlabel('Millisecond') % label for x axis
legend('Trial 1', 'Trial 2')
legend('Location','NorthWest') % move legend to upper left
Brave A
Brave A on 8 Apr 2019
Yes fixed but the problem still there. I'm new user for matlab if anyone can fix all my code I will appricated.

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Accepted Answer

Walter Roberson
Walter Roberson on 8 Apr 2019
X={ '0m45.364s','0m45.097s','0m46.984s','0m44.962s','1m29.656s'};
dt = datetime(X, 'InputFormat', 'm''m''s.SSS''s''');
Xms = milliseconds(dt - dateshift(dt, 'start', 'day'));
I used milliseconds rather than seconds because your x label says milliseconds. On the other hand, your x label is for your t variable (that we do not have values for), and your y label is for matrix size, which is in the 200 to 2000 range. It is not clear to me why you would plot elapsed time on the same axes as matrix size. It would make more sense to me if your were using the milliseconds from X as your X axis.

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