Printing Colon Values in a Vector
3 views (last 30 days)
Show older comments
Hello,
I am having a little trouble printing out colon values in a vector. For example:
for x = 1:10
y(x) = x
end
This seems to work for me. However, what if the values for x do not start with 1?
For example what I have right now is this:
for x= 23:78
y(x) = x
end
This produces a result like [0 0 0 ... 23 24 25 ... 78]. What I want to be able to do is start with 23 and end at 78 without the 0's; hence: [23 24 25 ... 77 78]. Any advice?
Thanks.
Also,
I am having a little trouble obtaining the mean values for y_coordinates in a rectangle. Currently, I am able to plot a rectangle about the centroid of a flower. What I want to do is use the impixel() command to obtain the RGB values - such that I can know the color. Since the x_values in the rectangle are same as the y_values change, mean(x_cood:x_cood + width) seems to work for me. However, I am unable to present the same for the y_cood. In other words, I want to be able to take the mean of all the y_coordindates at the x_coordinates such that I have an average of all the values within the rectangle. Then, I want to run the impixel() command. Here is what I have:
for U = 1:5:height
% plot(x_cood:x_cood + width,y_cood + U,...
% '--rs','LineWidth',2,...
% 'MarkerEdgeColor','k',...
% 'MarkerFaceColor','r',...
% 'MarkerSize',2)
% hold on;
x_mean = mean(x_cood:x_cood + width);
y_mean = mean(y_cood + U);
plot(x_mean,y_mean,...
'--rs','LineWidth',2,...
'MarkerEdgeColor','k',...
'MarkerFaceColor','r',...
'MarkerSize',2)
hold on;
rect_pixel = impixel(cam_image_rgb,x_mean,y_mean);
r = rect_pixel(1);
g = rect_pixel(2);
b = rect_pixel(3);
fprintf('Red = %0.2f, Green = %0.2f, Blue = %0.2f\n',r,g,b)
end
1 Comment
Fangjun Jiang
on 20 Oct 2011
Please ask one question at a time. After all, somebody else might search for a topic for answers.
Accepted Answer
Fangjun Jiang
on 20 Oct 2011
It is a matter of an offset, right?
Original:
for x= 23:78
y(x) = x
end
Can be done as:
for x= 23:78
y(x-22) = x
end
Or: y=23:78
More Answers (0)
See Also
Categories
Find more on Axes Appearance in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!