[Eeglablist] more std_stats questions

[Arnaud Delorme]

Dear Hamish,

as the error says the size of your time array is probably different from the size of your data array. Also, in general, the channels are in the second dimension not the first one (this is in the documentation of the function) which might also lead to a dimension problem. The last problem is that you set the 'plottopo' option to 'off' which means that the function does not know what to do with the multiple channels you are giving it as input. I tried your code and after fixing these issues, it did plot.

Best,

Arno

On Jun 19, 2011, at 11:15 PM, Hamish INNES-BROWN wrote:

> Sorry for the onslaught of stats questions, I think I'm a bit more advanced than where I was thismonring, but a few problems remain.
> 
> So, I have ERPs from 2 conditions which I would like to test for differences and plot. 60 electrodes, 500 time points, and 12 subjects:
> 
> ERP_c1 = [60 x 500 x 12]
> ERP_c2 = [60 x 500 x 12]
> 
> % put them together in the format I THINK is needed
> erpdata = {ERP_c1 ERP_c2}
> 
> 
> % Firstly calculate the stats:
> 
> paired = 'on' ; mode = 'param' ; naccu = 200;	%%%  0.01 = 200, .001 = 2000
> [stats, df, pvals, surrog] = statcond( erpdata, 'paired', paired, 'mode', mode, 'naccu', naccu );
> 
> This seems to work OK and provides 
> 1) t-values in a [60 x 500] and 
> 2) p values in a [60 x 500] (later I will change this to permutation test).
> 
> Now for plotting:
> 
> locs = eeg_mergelocs(ALLEEG.chanlocs);
> plotsubjects = 'off';
> times = EEG(1).times;
> 
> std_plotcurve(times, erpdata, 'condstats', {pvals}, 'chanlocs', locs, 'plotsubjects', plotsubjects, ...
> 		'condnames', cnames, 'plottopo', 'off');
> 
> 
> 
> No matter how I try I can't seem to get the input sizes right for this command. I keeping errors such as:
> ??? Error using ==> plotcurve at 87
> Size of time input and array input does not match
> 
> Error in ==> std_plotcurve at 371
>                    plotcurve( allx, tmpdata, 'colors', tmpcol, plotopt{2:end},
>                    'title', opt.titles{c,g});
> 
> Which suggests that something is wrong with the dimensions of the inputs.  As far as I can see all the relevant inputs are [60 x 500], apart from times, which is just [1 x 500]. If I change that to [60 x 500} (with the x values repeated 60 times), I get the same thing.
> 
> 
> 
> 
> 
> Hamish Innes-Brown
> Research Assistant
> The Bionics Institute of Australia
>  
> t: +61 3 9667 7529
> f: +61 3 9667 7518
> e: hinnes-brown at bionicsinstitute.org
> w: http://www.bionicsinstitute.org/profiles/HamishInnes-Brown.html
> w2: http://musicalbionics.wordpress.com/
> 
> 2nd International Medical Bionics Conference, Phillip Island, 20-23 Nov 2011
> http://www.iceaustralia.com/medicalbionics2011/ 
> 
> 
> 
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