A line does not appear when I plot

When I run this code it puts a graph with no line. how do I get the line to show?

[the cyclist]

If you post your code rather than an image of your code (or upload a *.m file), we can copy & paste it into MATLAB, which makes it much easier for us to help you.

[the cyclist]

FYI, it's very straightforward to write your code without any for loop at all, using vectorization.

Answer 1

[VBBV]

% inside the for loop
Temp(h) = q./(6*k_w)*(r_I.^2) + T_sI

% outside the for loop
Temp(Temp == 0 ) = [];
plot(1000:10000,Temp)

the above lines needs to be changed as shown, since you are plotting a point instead of a matrix

[VBBV]

You can otherwise put the plot function command inisde the for loop and plot the results

hold on
for h = 1000:10000
  % your code
  plot(h,Temp,'ro','MarkerSize',12)    
end

Answer 2

[the cyclist]

The way you have coded this, both h and Temp are going to be scalars (single values) after the loop completes, so there is only one point to plot.