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Assistance with creating multidimensional matrices
I would pre-allocate A before the for loop by using A = zeros(Rows,Cols); %Creates matrix of 0's % This will also act to c...

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change Black and White - Image to Black & Red Image
You need to define the colormap: imshow(BW,[0 0 0; 1 0 0]) % 0's are black and 1's are red

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Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

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ellipses on image
Use <http://www.mathworks.com/help/toolbox/pde/ug/pdeellip.html pdeellip> (if you have the PDE toolbox): pdeellip(xc,yc,a,b,...

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MATLAB Answers Wish-list #2 (and bug reports)
How about a link on the left hand navigation for FAQ and posts like Walter's on tags?

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Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

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add picture in matlab
do you have the image processing toolbox? if so: I = imread('imagename.extension'); The result will be a 2- or 3-D matri...

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cropping manually and automatic using matlab
*Manual method:* scenenum = input('Please enter the number of scenes you wish to crop: ') for m = 1:scenenum mask...

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radius of a spherical planet
you just measured its surface area, that is the input.

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Question


Creating vector of all numbers in a cell array.
This is probably an easy solution, but I cannot figure it out. I have an |m x m cell array| where each cell contains a |1 x ...

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Answered
Problem trying to access labeled portion of images (updated 7/5)
I switched to |*.**| over *|immultiply()|* and I haven't run into the error message again. This may not mean I am out of the wo...

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How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

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Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

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Target sorting
Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

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Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

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Question


Problem trying to access labeled portion of images (updated 7/5)
*UPDATE:* <http://dl.dropbox.com/u/56764179/data_dump.mat data_dump.mat> unique(diff(unique(endpts_labeled))) ans = ...

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Solved


Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

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Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

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Too mean-spirited
Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

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Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

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Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

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Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

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Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

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Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

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for loop doesn't seem to loop
You're not specifying the row of A that you are writing the data to, so each loop it just places [PVtech(i,:) WTtech(i,:)] into ...

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How can I deblur an image given the original PSF?
<http://www.mathworks.com/help/toolbox/images/ref/deconvlucy.html doc deconvlucy> the documentation mentions similar functions....

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Delete unique element in column
Based off of Jan's answer: A = [1 2; 1 3; 3 4]; [B, I, J] = unique(A(:,1),'last'); NewMatrix = A(I,:);

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How to implement 'Medfilt1' function into Simulink
If you have the Video and Image Processing Blockset, use the 2D median filter and change the "Neighborhood size" to 1xN or Nx1 (...

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Answered
If condition without loop
A(A>0 & A<=1) = 1; A(A>1 & <=2) = 2; Of course if you'd like to do this continuously (constantly rounding values, not ju...

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me not like new lay out of this section! (not a question)
What is the value of having a *"Home"* and *"Search"* link on the navigation panel (upper left hand side) if both link to the sa...

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