Creating a function that returns multiple graphs

45 次查看（过去 30 天）

Snoopy 2018-12-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/437417-creating-a-function-that-returns-multiple-graphs

编辑： TADA 2018-12-31

I would like to create a function that returns as output arguments two different histograms such that in the script file either of the two graphs can be called. If I am not mistaken, I could do this for one histogram as follows:

function myplot(data,nbins)
histogram(data,nbins)
end

How do I adjust the code for two histograms?

2 个评论
显示无隐藏无

Image Analyst 2018-12-27

编辑：Image Analyst 2018-12-27

What is x and what is y? Are they both data, or is y the number of bins or the edges for the histogram? Do you want just the counts like histcounts() returns? Or do you want the full histogram object with tons of information like histogram() returns?

Snoopy 2018-12-27

I edited my question. I would like that the function returns what the histogram function returns. I even want to add a title, legend, etc. to each histogram.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

TADA 2018-12-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/437417-creating-a-function-that-returns-multiple-graphs#answer_354145

在 MATLAB Online 中打开

function [h1,h2] = myplot(data, nbins)
    h1 = histogram(data,nbins);
    h2 = histogram(data,nbins);
end
% Or:
function h = myplot(data, nbins)
    h(1) = histogram(data,nbins );
    h(2) = histogram(data,nbins);
end

You Will Have To Decide How You Want To Send The Data To This Function. If In Matrices Or Cell Arrays Or Multiple Arguments (worst Option Probably), but This Above Is The General Idea.

The Second Option Is Somewhat More Versatile As You Can End Data An Array And Run In A Loop Generating As Many Histograms As You Need And Return All Of Them In A Vector Of Histogram Handles.

10 个评论
显示 8更早的评论隐藏 8更早的评论

Snoopy 2018-12-31

编辑：Snoopy 2018-12-31

在 MATLAB Online 中打开

data_sim = trnd(3,[3000,1]); 
nbins = -5:0.01:5;

Histogram one:

histogram(data_sim,nbins,'FaceColor','white','EdgeAlpha',0.15);
title('Fig: a')
legend('a')
ylabel('a')
xlabel('a')

Histogram two:

histogram(data_sim,nbins,'FaceColor','white','EdgeAlpha',0.15);
line([t t],ylim,'Color','blue') 
title('Fig: b')
legend('b','b')
ylabel('b')
xlabel('b') 

So how do I create a function that returns either of the two histograms when I call one in the script file?

TADA 2018-12-31

编辑：TADA 2018-12-31

在 MATLAB Online 中打开

I only see two options here, but they have different arguments

Histogram 1 only takes in 2 arguments (data_sim, nbins)

while Histogram 2 takes 4 arguments (data_sim, nbins, t, ylim)

If your third option has a different number of arguments you can use number of arguments to activate the different options of the function instead of the switch block:

h1 = doesItAll(rand(1,100), 10);
h2 = doesItAll(rand(1,100), 10, 0.5, 10);
function h = doesItAll(data_sim, nbins, t, ylim)
    plotType = '';
    if nargin >= 2
        h(1) = histogram(data_sim,nbins,'FaceColor','white','EdgeAlpha',0.15);
        plotType = 'a';
        xAxeLbl = 'a';
        yAxeLbl = 'a';
        plotLegends = {'a'};
    end
    
    if nargin >= 4
        h(2) = line([t t],[0 ylim],'Color','blue') ;
        plotType = 'b';
        xAxeLbl = 'b';
        yAxeLbl = 'b';
        plotLegends = {'b' 'b'};
    end
    
    title(['Fig: ' plotType]);
    legend(plotLegends);
    ylabel(yAxeLbl);
    xlabel(xAxeLbl);
end