Unkown Source of "Index in position 1 exceeds array bounds" error in simple line plot.

Hello all,

I've recently switched from Python to Matlab for a college Thermo class, and this is our first real coding assignment. I've got an errorbarplot that I would like to fit a line to, but I've been getting "Index in position 1 exceeds array bounds (must not exceed 1)." from the line containing "plot(x,y,'--')" in the following code. I found the polynomial fit using the curve fitting app, then just defined a function for the polnomial with the fit constants, to plot. I understand indexing, but I can't see why the array bounds of the plot function "must not exceed 1". I've tried quite a few different modifications, and nothing I've done seems to fix anything. I'd appreciate some community debugging.

x = linspace(1,4,4)
%also tried x = [1 2 3 4]
%and x = [1;2;3;4]
%But I get the same error every time

figure
p1 =1.965;
p2 = 0.01964;
y = p1*x + p2;
hold on

plot(x,y,'--')

title('Recurrence Time vs. Number of Particles')
xlabel('Particle Number')
ylabel('Recurrence Time')
hold off

[Stephen23]

@Jordan Brooks: please show us the complete error message. This means all of the red text.

[Image Analyst]

I agree with Stephen, since the code works and makes this figure:

Perhaps you've called your script plot.m??? What does this say:

>> which -all plot

Answer 1

[madhan ravi]

clear plot % at the very beginning plot seems to be a variable stored in the workspace

[madhan ravi]

Jordan Brooks's answer moved here:

Tried to add "clear plot" to the beggining of the code, didn't fix it unforunately.

[madhan ravi]

which plot -all % what shows up?

Also respond to Stephen Cobeldick's comment.

Answer 2

[Jordan Brooks]

The problem was that I had named another script plot.m and a function plot = something, and hadn't cleared the workspace, I think. Following that suggestion, I renamed everything from "plot", and cleared the workspace, now it works as expected. Thanks for the help all.