www.gusucode.com > graphics 案例源码程序 matlab代码 > graphics/DisplayTextAtMinimumAndMaximumValuesOnGraphExample.m
%% Determine Minimum and Maximum Points and Add Text % This example shows how to determine the minimum and maximum data points % on a graph and add text descriptions next to these values. % % Create a plot. x = linspace(-3,3); y = (x/5-x.^3).*exp(-2*x.^2); plot(x,y) %% % Find the indices of the minimum and maximum values in |y|. Use the % indices to determine the (x,y) values at the minimum and maximum points. indexmin = find(min(y) == y); xmin = x(indexmin); ymin = y(indexmin); indexmax = find(max(y) == y); xmax = x(indexmax); ymax = y(indexmax); %% % Add text to the graph at these points. Use |num2str| to convert the |y| % values to text. Specify the text alignment in relation to the data point % using the |HorizontalAlignment| property. strmin = ['Minimum = ',num2str(ymin)]; text(xmin,ymin,strmin,'HorizontalAlignment','left'); strmax = ['Maximum = ',num2str(ymax)]; text(xmax,ymax,strmax,'HorizontalAlignment','right');