What's the best plot for load spectrums?

Hey everybody!

I want to plot a typical load spectrum for reliability purpose. In this example I have 20 different load classes of a temperature load.

Since load spectrums usually have rectangular "steps" I tried the stairs-plot but I only managed the following plot:

It looks quite alright, but unfortunatly the plot lines in the 20th class should go horizontaly all the way to the y-axis.

My Code looks like this:

    stairs(az(end:-1:1),1:x, 'color', 'k')
    ylim([1 x+1])
    grid on
    set(gca, 'XScale', 'log')
    hold on                             %I'm plotting in a for-loop
    xlabel('Time [h]')
    ylabel('Temperature Classes [-]')
    title('Load Collective ')

x: Amount of classes

az: array of hours

Data:

x= 1:20;
az= [265,578,983,1479,2060,2728,3440,4175,4842,5446,6029,6597,7112,7579,7960,8270,8510,8665,8738,8759];

I counted 'az' backwards so that the 20th element of 'az' is connected to the class 20.

Does anyone have experience in plotting load spectrums of rainflow or dwell time data? Or does someone have an improvement of my code?

Your help is much appreciated, thank you!

[Mathieu NOE]

hello

maybe it would be usefull to share some data as well

tx

[Yannick Braun]

yes of course, I'll edit the question.

[Mathieu NOE]

well , I prefered to flip x instead of az

and I think the plot is now ok

x= 20:-1:1;
az= [265,578,983,1479,2060,2728,3440,4175,4842,5446,6029,6597,7112,7579,7960,8270,8510,8665,8738,8759];
%     stairs(az(end:-1:1),x, 'color', 'k','linewidth',5)
    stairs(az,x, 'color', 'k','linewidth',5)
    grid on
    set(gca, 'XScale', 'log')
    hold on                             %I'm plotting in a for-loop
    xlabel('Time [h]')
    ylabel('Temperature Classes [-]')
    title('Load Collective ')