I want to plot the data as shown. but it is giving error as : Error using plot Conversion to double from cell is not possible.

fid = fopen('C:\Users\1319146\Downloads\data.txt');

textLine = fgets(fid); % Read first line.

lineCounter = 1;

while ischar(textLine)

numbers = sscanf(textLine, '%f ');

x= length(numbers);

for k = 1 : x

ca{lineCounter, k} = numbers(k);

end

textLine = fgets(fid);

lineCounter = lineCounter + 1;

end

fclose(fid);

   c2 = ca(:,2);

   [n,p] = size (c2);

   t = 1:n;

plot(t,c2);

legend('Location 1','Location','NorthWest')

xlabel('Time'), ylabel('distance')

%c2=

    [ 1.3589]
    [ 7.9773]
    [28.2728]
    [28.2728]
    [      0]
    [      0]
    [      0]
    [      0]
    [      0]
    [      0]
    []
    [ 0.8705]
    [ 7.4681]
    [28.2728]
    [37.0303]
    [      0]
    [      0]
    [      0]
    [      0]
    [      0]
    [      0]

Answer 1

[Star Strider]

I cannot run your code to test this.

See if this works:

plot(t,c2{:});

Not the curly brackets ‘{}’ in the ‘c2’ reference.

[Sachin Patil]

Its working correctly. But when i increased the number of data(readings) from 21*1 to 250*1, then it is giving error as: Data must be a single matrix Y or a list of pairs X,Y