MATLAB: Question about plotting, getting subvectors

plot

Hi,

I'm new to Matlab central, but not new to Matlab itself. I'm running a simulation which has an end results of two columns of values. I ususally plot these values using plot(1stcolumn,2ndcolumn). My question is: how do I plot only a small amount of these values? Like say 1stcolumn(40) to 1stcolumn(60)? I've tried exactly this in Matlab, but I am only getting an empty graph sheet (no errors are showing either):

plot(1stcolumn(40),2ndcolumn(40),1stcolumn(40),...
2ndcolumn(40)1stcolumn(40),2ndcolumn(40),...
1stcolumn(40),2ndcolumn(40))

What am I doing wrong?

RebSam

Best Answer

vector(1:40) %get all values from index 1 to 40

Your mistake is that you just plot the value at index 40 with your code vector(40)

Related Solutions

MATLAB: Displaying the radius on the plot

I am not quite certain what you want.

The Code —

t = linspace(0, 2*pi);
r = [1.5; 2];                                           % Radius
ctr = [0.5; 0.2];                                       % Circle Center
x = [r*cos(t) + ctr(1)]';
y = [r*sin(t) + ctr(2)]';
figure
plot(x, y)
hold on
plot([1 1]*ctr(1), [1 1]*ctr(2),'+r')                    % Plot Center
plot([ctr(1) x(20,1)], [ctr(2) y(20,1)],'-b')
plot([ctr(1) x(40,2)], [ctr(2) y(40,2)],'-r')
hold off
axis equal
axis([ -3  3    -3  3])
text(x(20,1), y(20,1), '$R\ =\ 1.5$','Interpreter','latex')
text(x(40,2), y(40,2), '$R\ =\ 2.0$','Interpreter','latex')

The Plot —

This draws the radii and labels them.

Experiment to get the result you want.

MATLAB: Does the Stateflow Coder generate wrong code when the “Seperate arguments for input/out data” option is selected in Stateflow

This is a bug in Stateflow 4.0.3 (R12+) and beyond. This will be fixed in a future version of Stateflow.

Currently, there are no known workarounds.

Best Answer

Related Solutions

MATLAB: Displaying the radius on the plot

MATLAB: Does the Stateflow Coder generate wrong code when the “Seperate arguments for input/out data” option is selected in Stateflow

Related Question