How do I fix my legend?

Hello,

'parnam' contains 8 1x1 structures (data and text). The data contains the latitude, longitude and altitude of a sensor. I want to create a legend for my plot that states the latitude of each plot, but it only prints the first.

figure
for k=1:m
scatter(x(:,k),y(:,k)), hold on
legend(sprintf('aircraft at %2.2f degrees latitude', parnam{1,k}.data(1,1)))
end
hold off

Answer 1

[dpb]

There's only one legend per plot; you're overwriting each pass thru the loop.

for k=1:m
  scatter(x(:,k),y(:,k))
  if k==1, hold on, end  % can't get an "onner"
end
legend(num2str(parnam{1,1:m}.data(1,1)).','aircraft at %2.2f degrees latitude')

[Alex]

??? Bad cell reference operation.

MATLAB doesnt like "...{1,1:m}".

This works though so thank you:

figure
 for k=1:m
 scatter(x(:,k),y(:,k)), hold on
h(k,:) =sprintf('aircraft at %2.2f degrees latitude', parnam{1,k}.data(1,1)) ; 
 end
 legend(h)
 hold off

[Walter Roberson]

legend( cellstr( num2str( cellfun( @(C) C.data(1,1), parnam(1,1:m) ) .', 'aircraft at %2.2f degrees latitude' ) ) )

[Walter Roberson]

Alex, your version will not work if some of the data values have a different number of digits, such as 3.7 degrees or 13.7 degrees. But you could use

figure
 for k=1:m
 scatter(x(:,k),y(:,k)), hold on
h{k} = sprintf('aircraft at %2.2f degrees latitude', parnam{1,k}.data(1,1)) ; 
 end
 legend(h)
 hold off