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Adding text to the plot values in the plot

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Gova ReDDy
Gova ReDDy 2011-10-10
Hi..Am plotting the different values of slopes of lines in a single plot .But I want to indicate each plotted value with the respective line number how can I do this.. previously I am storing slope values in slope(K).. then am using
for k=1:n
plot(slope,'*')
end
Can someone suggest about this...
  1 个评论
Image Analyst
Image Analyst 2011-10-10
Why do you need/want the for loop? The plot function call will plot the whole thing - the whole slope array. You're just plotting the whole thing n times.

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采纳的回答

Walter Roberson
Walter Roberson 2011-10-10
Either use legend(), or text() a label in place somewhere along the line.
  9 个评论
显示 7更早的评论
Walter Roberson
Walter Roberson 2011-10-20
isempty() can tell you whether there was a result from find() or not.
But again, what if there were (say) 5 values found?
Gova ReDDy
Gova ReDDy 2011-10-20
Am plotting the "slope" value against "frames".
for k = 1 :240 %no.of frames
%Here in loop am extracting the line from each frame then
[ycoord,xcoord]=find(line);%finding the coordinates of line
Ymax(k)=max(ycoord);
Ymin(k)=min(ycoord);
Xmax(k)=max(xcoord);
Xmin(k)=min(xcoord);
slope(k)=(Ymax(k)-Ymin(k)/Xmax(k)-Xmin(k));%slope=y2-y1/x2-x1
end;
plot(slope,'-ro');%plotting slope values of frames
xlabel('Fame number');
ylabel('SLOPE Of Line In the Frame ');
title('SLOPE PLOT of the VIDEO');
when there is no line in the next frame then the slope value should be zero..
else it should calculate the slope value .

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更多回答（1 个）

Gova ReDDy
Gova ReDDy 2011-10-24
This is working
if((isempty(xcoord)=1) && (isempty(xcoord)=1))
then
caluclate slope
else
slope=0;
end

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