Plotting for specific values

I have a matrix U of size (P + 1)*(N+1) , 2 row vectors node and t of lengh P + 1 and N+1 respectively.

These row vectors are defined as follows :

node = linspace(0, 1 ,P+1)

t = linspace(0, T, N+1)

Take T to be 2.5 and choose P and N arbitrarily.

plot(node,U(:,161), node, U(:, 321), node,U(:,481), node, U(:,641),node,U(:,801));

Here 161 is when t = 0.25, 321 is when t = 0.5, 481 is when t = 0.75, 641 is when t = 1.0 and so on.

How can I accomplish this task without hard coding ? I want to plot U(: , t) against node for specific values of t = 0.25,0.5,0.75 and so on.

Any help appreciated.

Answer 1

[Jon]

plot(node,U(:,t==0.25),node,U(t==0.5)) % and so on

[Jon]

You could further genaralize this as

tPlot = 0.25:0.25:tPlotMax % for some defined value of tPlot
plot(node,U(:,t==tPlot(1)),node,U(t==tPlot(2))) % and so on

You just have to be careful that the values in tPlot are an exact match for values in t

[Purnjay Peshawaria]

Thanks!!