Plotting a cell array with double values

Hello,

I am very new to Matlab and searched a lot to find a solution to the problem I am facing but, somehow I have not been able to.

I have an array which looks something like - test1 = 0.3; test2 = 0.4; test3 = 0.5; test4 = 0.2;

testArray = {test1, test2, test3, test4}

I would like to plot this with y-axis having a scale from say 0-1 and, x-axis having values test1, test2, test3, test4 and the actual plotted values on the graph being the values of these variables (0.3, 0.4, 0.5, 0.2).

Is this possible in Matlab? If yes how? And if not, can I at least have something which is close this kind of display? If I just try to plot testArray by using plot(testArray), I get an error -

??? Error using ==> plot Conversion to double from cell is not possible.

which I am guessing is not too hard to solve but that is only a backup display which I would like if, there is not better way to display what I want.

Thank you.

Answer 1

[Walter Roberson]

Use

testArray = [test1, test2, test3, test4]

and the problem will go away.

plot(1:4, testArray, 'XTick', 1:4, 'XTickLabel', {'test1', 'test2', 'test3', 'test4'})

I wonder, though, whether you would perhaps prefer to use bar() instead of plot() ?

[Apar]

Thank you for the prompt reply.

I tried what you suggested and I think I should be able to figure it out from there because I wasn't sure about the properties set on the plot. I get the following error -

>> plot(1:4, testArray, 'XTick', 1:4, 'XTickLabel', {'test1', 'test2', 'test3', 'test4'})

??? Error using ==> plot

Invalid property found.

Object Name : line

Property Name : 'XTick'.

I think bar might be a better idea as you suggested :) but, right now I just need some kind of visualization!

[Apar]

Instead of using -

plot(1:4, testArray, 'XTick', 1:4, 'XTickLabel', {'test1', 'test2', 'test3', 'test4'})

as you suggested. I did the following and it worked.

plot(testArray)

set(gca, 'XTickLabel', {'test1', 'test2', 'test3', 'test4'})

Thank you!

[Elias Salilih]

What about plotting cell vs double using double axis plot (i.e., plotyy)

Answer 2

[Yoav Livneh]

Use

testArray = [testArray{:}];

This will transform testArray into a regular array which you can plot using

plot(testArray)

[siddharth rawat]

Simplicity is elegance.