Convert 190x1 cell array into scatter plot?

I have a 190x1 cell array and each cell contains {131x1}. The 190 represents the number of time points or what I want listed as my x-axis. Then each cell contains 131 data points that I want to be my y value for each x-axis value. I can figure out how to get the y values, but unable to figure out how to get the corresponding x-value. I'm sure there is a simple explanation, but i haven't been able to find it through the mathworks website!

x=??

y=cell2mat(data(:))

scatter(x,y)

Thank you so much!

Answer 1

[Chunru]

% Data: 190x1 cell array and each cell contains {131x1}.
ncells = 20;
npoints = 50;
for i=1:ncells
    data{i, 1} = randn(npoints, 1);
end

x=1:npoints;
y=cell2mat(data');        % assume data is ncells x 1

scatter(x,y)

[Elizabeth Walter]

Thank you for answering my question.. I still don't seem to be able to get it to work though :(

Here is what I have:

% Data: 190x1 cell array and each cell contains {131x1}.

Data = 190x cell array with each cell contains {131x1}

ncells = 131;

npoints = 190;

x=1:npoints;

y=cell2mat(data'); % assume data is ncells x 1

scatter(x,y)

x variable is a 1x190 array

y variable is 131x 190 array

and I keep on getting the error that x and y must be vectors of the same length.

[Chunru]

You have to show what data you have. It looks like your cell array is 1 x ncells instead of ncells x 1. Each cell is 1x190 instead of 190 x 1. Therefore, you can plot the data:

scatter(x, y')

[Elizabeth Walter]

hmm yeah I was unable to get that method to work.

However I used your "y=cell2mat(data')" part

to figure out something else

so I made

x=1:190 (or 1 x 190 array)

but made this into an repetitive array so it matched the y data which was 131 x 190

so with both matrixes 131 x 190 I turned them back into vectors to finally produce the scatter (x,y)!