trend line not drawing in sub-plot

Hello,

I have this really strange issue going and it is really confusing me. I am trying to plot a trend line through a set of data and I can do it just fine in a regular plot, but as soon as I add it to a sub-plot, I can get either the data or the trend line and not both.

I did try to do it with the toolbox but in a subplot figure, I can only get 1 trend line to show up on any of my 5 subplots at a given time. so both methods are 'either or' and not both :(

any help would be greatly appreciated. thanx.

here is my code i am testing with.

a = [1 2 3 4 5]';
b = [3 7 9 3 7]';

figure
hold all

plot (a,b);
% plot trend line
f = fittype('a*x+b'); %define fittype
fitobj = fit(a,b,f); %fit line to data
plot (fitobj,'k') %plot trend line

figure
subplot(2,1,1)
plot (a,b);
% plot trend line
f = fittype('a*x+b'); %define fittype
fitobj = fit(a,b,f); %fit line to data
plot (fitobj,'k') %plot trend line

Answer 1

[Sean de Wolski]

You need to hold on to your subplot!

figure
subplot(2,1,1)
hold on
plot (a,b);
% plot trend line
f = fittype('a*x+b'); %define fittype
fitobj = fit(a,b,f); %fit line to data
plot (fitobj,'k') %plot trend line

[nori]

jeez. i have been whacking at that problem for 2 hours!! i did try putting the 'hold' after the figure but i didnt try after the 'subplot'

thanks so much!