example of plot and find and mark maximum and minimum values on a plot using Matlab

Contents

• example of plot and find and mark maximum and minimum values on a plot
• close
• generate a simple plot
• find the mimimum value
• find the max value

example of plot and find and mark maximum and minimum values on a plot

Author: minhanhnguyen@q.com

close

close all; % Clear all windows
clear all; % Clear all variables
clc; % Clear console

generate a simple plot

x = linspace(-3,3);
y = (x/5-x.^3).*exp(-2*x.^2);
plot(x,y)

find the mimimum value

indexmin = find(min(y) == y);
xmin = x(indexmin);
ymin = y(indexmin);

strmin = ['Minimum = ',num2str(ymin)];
text(xmin,ymin,strmin,'HorizontalAlignment','left');

find the max value
indexmax = find(max(y) == y);
xmax = x(indexmax);
ymax = y(indexmax);
strmax = ['Maximum = ',num2str(ymax)];
text(xmax,ymax,strmax,'HorizontalAlignment','right');




Published with MATLAB® R2015a