plotting cells from arrays

 for k2 = 1:22
 data2 = mean(cellfun(@(x) x(k2,4), thething))
 plot(data2,'-')
end

this is my codes. thething is my arrays contain cells. After I run the scripts, the plot just show nothing on it. Please tell me what's wrong with my code?

[KSSV]

what is size and class of data2?

[Kuang-Yu WANG]

it shows a number

[Stephen23]

Probably plotting inside the loop is not useful. Put the values in an array, and then plot that after the loop.

[Kuang-Yu WANG]

tried. but the result is still. the line do not shows up

[Stephen23]

@Kuang-Yu WANG: your comment states that the size of the data that you are plotting is 1x1: this will not be visible unless you change the marker type. In any case, even if you specify the marker you will not get a line unless you do what I recommended earlier: collect the data into one matrix and then plot it after the loop. The plot help has plenty of examples (in fact all of the examples) showing how to plot matrices, so start by looking at that.

[Ankita Bansal]

Hi, can you share " thething" ?

[Kuang-Yu WANG]

thething = 63×1 cell array

{ 26×7 double} { 42×7 double} { 28×7 double} { 22×7 double} { 29×7 double} { 26×7 double} { 35×7 double} { 25×7 double} { 35×7 double} { 23×7 double} { 41×7 double} { 22×7 double} { 28×7 double} { 31×7 double} { 30×7 double} { 40×7 double} { 33×7 double} { 32×7 double} { 33×7 double} { 85×7 double} { 49×7 double} { 86×7 double} { 56×7 double} { 70×7 double} { 59×7 double} { 42×7 double} { 65×7 double} { 50×7 double} { 76×7 double} { 44×7 double} { 54×7 double} { 62×7 double} { 82×7 double} { 55×7 double} { 45×7 double} { 66×7 double} { 74×7 double} { 80×7 double} { 47×7 double} { 59×7 double} { 69×7 double} { 45×7 double} {105×7 double} { 98×7 double} {109×7 double} {118×7 double} {102×7 double} { 74×7 double} { 63×7 double} { 77×7 double} {169×7 double} {181×7 double} {240×7 double} {212×7 double} {150×7 double} {243×7 double} {251×7 double} {281×7 double} {281×7 double} {269×7 double} {281×7 double} {281×7 double} {211×7 double}

[Stephen23]

@Kuang-Yu WANG: please upload your data in a .mat file by clicking the paperclip button.

Answer 1

[KSSV]

   figure
   hold on
   for k2 = 1:22
      data2 = mean(cellfun(@(x) x(k2,4), thething))
      plot(data2,'-')
   end

[Kuang-Yu WANG]

Sorry still don't work.

[KSSV]

What is class and size of data2?

[Kuang-Yu WANG]

 size(data2)

ans =

     1     1

[Kuang-Yu WANG]

it works after i use the brush to select the data in screen. however why can't I plot out a line but just many dots?