Plot of maximum value of chosen column in matrix

3 次查看（过去 30 天）
重新打开： madhan ravi 2018-11-15 
 clear
 close all
 clc
 t = linspace(0,10,15);
 t = t';
 rng default
 M = rand(15,5);
 plot(t, M(:,1));
 max_M = max(M); %maximum of each column
 max = max(max(M)); %total max

I would like to plot maximum value of first column of matrix M(:,1); and indicate this information on a plot.

Something like this:

请先登录，再回答此问题。

回答（2 个）

madhan ravi
madhan ravi 2018-10-23
编辑：madhan ravi 2018-10-23
t = linspace(0,10,15);
t = t';
rng default
M = rand(15,5);
plot(t, M(:,1));
hold on
m = M(:,1)
[P,K]=findpeaks(m)
plot(t(K(1)),P(1),'x')
hold off
  4 个评论
显示 2更早的评论
/matlabcentral/profile/authors/13737395 2018-10-23
starting_point, ending_point - You mean I should define here X abscissa?

请先登录，再进行评论。

jonas
jonas 2018-10-23
编辑：jonas 2018-10-23
In this case you could simply find the max in each column in one go
[vm,idx] = max(M); %maximum of each column
plot(t,M);
scatter(t(idx),vm,'rx');
would you prefer to plot only the max of the first column, then
scatter(t(idx(1)),vm(1),'rx')

类别

在 Help Center 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息

标签

产品


版本

R2018b

Community Treasure Hunt

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

Start Hunting!

Translated by