Hi,

I am not sure what you want to do. Do you want to plot the two curves together in the same axis?

Use "hold on"

best, M

Hi,

I am not sure what you want to do. Do you want to plot the two curves together in the same axis?

Use "hold on"

best, M

hello kouba,

1 - using command " hold on/off'" you can plot n curves in a one figure and their difference where be shown,

2 - or you can plot their difference in a figure,

3- or using time based characteristics like Overshoot, Undershoot, rise time, settling time of 2 figures, you can show their difference of figures, even you can use ITAE index,

method 3 can be down without programming in editor,

good luck,

hello, I don't know what you want to do. but , I think you may plot two curves in a figure, there is two ways to do:

1)use 'hold on' command

2)use different colors, eg. red 'r' yellow 'y' et.

I hope that it is helpful for you.

Hi, Kouba,

If you want to fill an area between two curves, there is a discussion in the stackoverflow forum (http://stackoverflow.com/questions/6245626/matlab-filling-in-the-area-between-two-sets-of-data-lines-in-one-figure) which you need to read.

The best way is of course to take the difference and plot the residuals. :)

I am also not sure what exactly you want to do. Anyway, if you want to fill the area between two curves, you can use the comand 'area' in Matlab. You can check the help to know how to use it.

x = 1:100; %# X range

y1 = rand(1,100)+1.5; %# One set of data ranging from 1.5 to 2.5

y2 = rand(1,100)+0.5; %# Another set of data ranging from 0.5 to 1.5

baseLine = 0.2; %# Baseline value for filling under the curves

index = 30:70; %# Indices of points to fill under

plot(x,y1,'b'); %# Plot the first line

hold on; %# Add to the plot

h1 = fill(x(index([1 1:end end])),... %# Plot the first filled polygon

[baseLine y1(index) baseLine],...

'b','EdgeColor','none');

plot(x,y2,'g'); %# Plot the second line

h2 = fill(x(index([1 1:end end])),... %# Plot the second filled polygon

[baseLine y2(index) baseLine],...

'g','EdgeColor','none');

plot(x(index),baseLine.*ones(size(index)),'r'); %# Plot the red line

thanks A. Jabbari 

hi,

x = linspace(1,10,10); % range of your value

figure

hold on

fill( [x fliplr(x)], ['first curve' fliplr('second curve')], 'b');

%don't forget the vector value should be in column not row.

Hello Nada:

   There are lot of Matlab m file, code examples at:

ftp://ftp.wiley.com/public/sci_tech_med/matlab_codes

Hello sir, 

I have the same query. Can you give solution to it.

can u provide the link