Histogram distribution with two vectors

9 次查看(过去 30 天)
Hi there,
I have two separate vectors, one for vehicle power and another one for vehicle speed. I am trying to have a histogram to show a power vs speed distribution. I have attached an image to assist with understanding.
Thanks,
  3 个评论
Naser Khan
Naser Khan 2022-7-4
Hi,
I have two vectors for the two axes. I am essentially looking to have the frequency (y-axis) of the power at different speed (x-axis). The speeds can be spaced out in steps of 5 or 10.
My query is whether its possible to plot a histogram based on an X-Y plot?
Thanks
Torsten
Torsten 2022-7-5
编辑:Torsten 2022-7-5
And what is the solid line in the graph ? Is it a kind of regression line approximating the speed/frequency relationship ?

请先登录,再进行评论。

回答(1 个)

Image Analyst
Image Analyst 2022-7-4
Since you say "I have two vectors for the two axes. I am essentially looking to have the frequency (y-axis) of the power at different speed (x-axis). The speeds can be spaced out in steps of 5 or 10."
then your y vector is already the frequency (histogram) so no need to call histogram() because you've already done that. The histogram function can do the plotting for you, or if you'd rather plot the frequency as bars like your graphic showed, then you can use bar
bar(speedVector, frequencyVector);
grid on;
  2 个评论
Naser Khan
Naser Khan 2022-7-4
I see, is there a way I can group my speed vector into segments so the x axis doesn’t become very long?
I believe this may require me to do normalising with a histogram?
Thanks
Image Analyst
Image Analyst 2022-7-4
Sure, when you got your y values (counts in each hisotgram bin), you could specify the bin edges if you wish.
% Specify which x values should be grouped into each bin
% by definining the edges (dividing lines) between bins.
edges = [-inf, 0:20:100, inf];
% Get the y values which is the frequency (count)
% of how many data points are in each bin.
[counts, edges] = histcounts(data, edges);
bar(edges(1:end-1), counts);
grid on;

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Histograms 的更多信息

标签

产品


版本

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by