Answered

How can I perform matrix operations on certain rows?

What do you mean by 'certain'? Is there any condition that determines the selection of years. Then, you could use a logical arra...

How can I perform matrix operations on certain rows?

What do you mean by 'certain'? Is there any condition that determines the selection of years. Then, you could use a logical arra...

4 years ago | 0

Answered

I have video with 10 frames. I want the video depth. In other words stack 10 frames and get the thickness of the stack as a whole. Can anybody help me?

I'm not sure what you mean by depth/thickness but if you stack N frames of size (HxWxC) into a video (4d array of size HxWxCxN),...

I have video with 10 frames. I want the video depth. In other words stack 10 frames and get the thickness of the stack as a whole. Can anybody help me?

I'm not sure what you mean by depth/thickness but if you stack N frames of size (HxWxC) into a video (4d array of size HxWxCxN),...

4 years ago | 0

Question

detect checkerboard pattern (non-solid dark colour)

I am trying to detect the checkerboard points in the image below. If that's not possible, I would like to split the image into 6...

4 years ago | 2 answers | 0

Question

How to read in a csv file with uneven columns?

My csv file has two different types of rows: Sep 30, 2016 15:45:09.486686950 BST 00:00:00:aa:00:df ARP 44 S...

4 years ago | 1 answer | 0

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

6 years ago

Answered

how to fit gaussian model and plot it

You can do the following: 1) Estimate the mean and standard deviation using _normfit_ 2) Calculate the probability estimat...

how to fit gaussian model and plot it

You can do the following: 1) Estimate the mean and standard deviation using _normfit_ 2) Calculate the probability estimat...

6 years ago | 1

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Solved

Return the 3n+1 sequence for n

A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

6 years ago

Answered

How to find standard deviation of a RGB image?

std2 calculates the standard deviation of an RGB image. Look up <http://uk.mathworks.com/help/images/image-mean-standard-devi...

How to find standard deviation of a RGB image?

std2 calculates the standard deviation of an RGB image. Look up <http://uk.mathworks.com/help/images/image-mean-standard-devi...

6 years ago | 0

Question

how to override a diary command if another diary already exists?

I usually create a log file at the start of each session by adding it to startup.m. Now, I'm trying to run a piece of code that...

7 years ago | 1 answer | 0

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN

Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

7 years ago

Solved

Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

7 years ago

Answered

sort vector elements under given restrictions

You can create a logical array (same length as v) with 1's for the positions you want (say, 3 and 5) and 0's for the rest and us...

sort vector elements under given restrictions

You can create a logical array (same length as v) with 1's for the positions you want (say, 3 and 5) and 0's for the rest and us...

7 years ago | 0

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Question

matlab hangs when help window is opened

I have MATLAB R2014a 64-bit mac. Whenever I try to open the help window (either by clicking on Help in any of the toolbars or by...

7 years ago | 1 answer | 0

Question

multidimensional array to column vector with different dimensional order?

Say I have two arrays: if true % code count = 1; for m = 1:3 for n = 1:3 for k = 1:3 A(count) = count; count = c...

7 years ago | 1 answer | 0

Question

how do I draw the cluster boundaries in a scatter plot?

<</matlabcentral/answers/uploaded_files/9042/example.jpg>> I have a scatter plot of three clusters. How can I represent them ...

7 years ago | 2 answers | 1

Solved

Select every other element of a vector

Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

8 years ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

8 years ago

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Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

8 years ago

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Determine if input is odd

Given the input n, return true if n is odd or false if n is even.

8 years ago

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

8 years ago

Question

8 neighbours of a pixel after converting to 1D array

Hi Is there a simple way to access the 8 neighbours of a pixel x(i,j) given by x(i-1,j-1), x(i-1,j), x(i-1,j+1), x(i,j-1), .....

8 years ago | 3 answers | 2