Indexing error when using the plot function.

Super basic, but what is wrong with the code below? I'm not understanding. Multiple tutorials state that the code below should be perfectly fine? But I end up receving the error that is shown below the code.

x=[0 1 2 3 4];
y=[2 9/4 38/17 161/72 682/305];

plot(x,y)

Index in position 1 is invalid. Array indices must be positive integers or logical values.

Error in test (line 4)

plot(x,y)

Answer 1

[madhan ravi]

clear all
% you have a variable named plot

[Adam Danz]

+1 To add on to Madhan's answer, you can confirm that by running this line

which plot

which will return "plot is a variable". You should never name a variable "plot".

This recreates your error

plot = 1:4;  %variable named plot (gasp!)

%now treat plot as a funciton
x=[0 1 2 3 4];
y=[2 9/4 38/17 161/72 682/305];
plot(x,y)

"Index in position 1 is invalid....."