# plotting a 1*1 matrix

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Ioannis on 12 Jan 2014
Answered: Paul on 12 Jan 2014
Hi i want to plot a 1x1 matrix with time but i keep getting the same error ??? Error using ==> plot Invalid property found. Object Name : line Property Name : 'time'. My matrix has 10028 data,it's name is current and the code is the follownq: t=1:0.001:10; plot(t,current)

Mischa Kim on 12 Jan 2014
Edited: Mischa Kim on 12 Jan 2014
First, t and current need to be of same size, both 1x10028 (or 10028x1) vectors. So, for example, use
t = linspace(1,10,10028);
plot(t, current);
Note, that in the above case, time is an evenly spaced vector, starting at t=1 and ending at t=10 .
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Azzi Abdelmalek on 12 Jan 2014
Edited: Azzi Abdelmalek on 12 Jan 2014
If you still have the same problem, why did you accept the answer?

Azzi Abdelmalek on 12 Jan 2014
The size of t and current aren't the same. Look at this example
t=1:0.001:10;
current=sin(t);
plot(t,current)
When you type in command windows
whos current
What did you get?
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Azzi Abdelmalek on 12 Jan 2014
Edited: Azzi Abdelmalek on 12 Jan 2014
Ok , then when you type
whos current
What did you get?

Image Analyst on 12 Jan 2014
Edited: Image Analyst on 12 Jan 2014
If you do
t=1:0.001:10
then t has 9001 elements, not 10028. If you want 10028 then do this
t = linspace(1, 10, 10028);
plot(t, current, 'b-', 'LineWidth', 2);
Ot, maybe current is a structure. Try whos current and see what it says. Is it a 10028 by 1 array?
And you might have an m-file called plot or current hanging around somewhere. What do these two lines report
which -all plot
which -all current

Paul on 12 Jan 2014
If your data is from simulink, it's probably a structure with time. To plot your data you have to do:
plot(current.time,current.signals.values)
You can change what type of data simulink outputs by double clicking the output block and setting it for example to array. Then you won't have a structure but a simple array. To also output the time, you can just put a clock (block) in simulink and connect to an output block with an array type named t or something. Then you can plot the data by doing:
plot(t,current)