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Median filtering for medical images
doc medfilt2 Is probably a good place to start.

14 years ago | 0

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Displaying images after a Fourier Transform and Phase Retrieval Algorithms
your first question: doc ifftshift % ;)

14 years ago | 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...

14 years ago

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referencing arrays
action = { ['short'] ['long'] ['waiting'] ['short']}; profit = { [-50.00] [100.00] [0] [20.00]}; resul...

14 years ago | 0

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how to limit arrow length in 3D quiver plot?
Couldn't you just takle the log or log10 f the u/v/w components? 2-d example: [xx yy] = meshgrid(1:5); u = (rand(5)+1)....

14 years ago | 0

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How to converting 2D MRI dcm files to 3D VRML (STL, VRML files)??
I would recommend looking here first in a valiant attempt to save yourself from reinventing the wheel: <http://www.mathworks....

14 years ago | 1

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Integrating A Vector (Or rather a series of point values)
trapz([0.6 1.3 2:5],[12.6 87.2 74.2 45.3 23.4 14.2]) And to see if it makes sense, look at each trapezoid's contribution:...

14 years ago | 1

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Simple reformat data question
If you can explain what's going on we might be able to help you with a more general solution. Otherwise, there doesn't appear t...

14 years ago | 0

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Sorted highest to lowest?
Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1

14 years ago

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Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

14 years ago

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Computing times differences between computers
Is one 32bit and the other 64? If so, it is expected that the 32bit system will run faster. Try running |bench| on both mach...

14 years ago | 0

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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...

14 years ago

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

14 years ago

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FREAD() help
You have to specify the precision of the numbers you're reading (i.e. double). You could also look at |dlmread| and |dlmwrite...

14 years ago | 0

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Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

14 years ago

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All capital?
Are all the letters in the input string capital letters? Examples: 'MNOP' -> 1 'MN0P' -> 0

14 years ago

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Given an unsigned integer x, find the largest y by rearranging the bits in x
Given an unsigned integer x, find the largest y by rearranging the bits in x. Example: Input x = 10 Output y is 12 ...

14 years ago

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Find perfect placement of non-rotating dominoes (easier)
Given a list of ordered pairs, find the order they should be placed in a line, such that the sum of the absolute values of the d...

14 years ago

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Timer precedence during called functions
Set the timer's _'busymode'_ option to _'queue'_ so that the most recent event is queued. Then add a bunch of |drawnows| in you...

14 years ago | 1

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How to export text box values into text file
doc fopen doc fprintf doc fwrite doc fclose A combination of these.

14 years ago | 0

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Improving MATLAB code ideas? - cells and matrices
How are you generating _a1,a2,b1,b2,etc._? Store the _'a's_ along the third dimension of a matrix and concatenate the _'b's_ co...

14 years ago | 0

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loop intial guesses in fsolve
Copying and pasting what you have above works for me. What do you have for |fsolve|? IS it being shadowed perhaps? which ...

14 years ago | 1

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By element average of multiple matrices
Stack your 40 matrices into one three-dimensional matrix, then take the mean along the 3rd dimension meanMatrix = mean(stac...

14 years ago | 1

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Getting minimum value from an array
[val index] = min(A(~~A)) If you wanted the index involving zeros, find it after index = find(A==val,1,'first')

14 years ago | 0

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Deciphering an Error message
x = rand(2,2) _x_ is now a 2x2 matrix. If I try to get x(3,3): x(3,3) I'll get that error because x(3,3) doesn't...

14 years ago | 0

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Help on solving equation
Use a |for|-loop to loop through your _w_ values. for ii = 1:numel(w) solve_with_w(ii) end

14 years ago | 0

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Quote Doubler
Given a string s1, find all occurrences of the single quote character and replace them with two occurrences of the single quote ...

14 years ago

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Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

14 years ago

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Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

14 years ago

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Write a program in a script file that determines the real roots of a quadratic equation
doc roots and, specifically: roots([a b c]);

14 years ago | 1