"Inputs must be scalars" error message whilst using linspace command

Im trying to use the linspace command (in the form of x1,x2,n)on the second column of a previously created array, so that it creates vectors from the highest value to the lowest value but I keep getting an error message saying "inputs must be scalars". Here is the section of my code:

A=table2array(Data);

SSD = A(:,3)-SimulatedY.^2;

SSD = sum(SSD);

Xplot(icount,jcount,kcount) = i;

Yplot(icount,jcount,kcount) = j;

Tplot(icount,jcount,kcount) = k;

Zplot(icount,jcount, kcount) = SSD;

if SSD < MinimumSSD

MinimumSSD = SSD;

Bestparams1 = i;

Bestparams2 = j;

Bestparams3 = k;

end

end

end

end

figure

hold on

plot(A(:,1),A(:,3),'o') %plot actual data

a =linspace(min(A(:,2)):max(A(:,2)),30);

Answer 1

[Jon]

your last line of code should be

 a =linspace(min(A(:,2)), max(A(:,2)),30);

you had a colon separating min(A(:,2)) and max(A(:,2)) you need a comma