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~~~~~~~ WAVE ~~~~~~~~~

|The WAVE generator| Once upon a time there was a river. 'Sum' was passing by the river. He saw the water of the river that w...

10 hours ago

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Remove the air bubbles

Given a matrix a, return a matrix b in which all the zeros have "bubbled" to the top. That is, any zeros in a given column shoul...

10 hours ago

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Draw 'E'

Draw a x-by-x matrix 'E' using 1 and 0. (x is odd and bigger than 4) Example: x=5 ans= [1 1 1 1 1 1 0 0 0 0 ...

10 hours ago

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Piecewise linear interpolation

Given an Mx2 vector and a row of M-1 integers, output a two column vector that linearly interpolates Y times between each succes...

10 hours ago

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We love vectorized solutions. Problem 1 : remove the row average.

Given a 2-d matrix, remove the row average from each row. Your solution MUST be vectorized. The solution will be tested for ac...

11 hours ago

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intersection of matrices

Given two matrices filled with ones and zeros, determine if they share a common row, column entry. These matrices are of identi...

11 hours ago

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Generate N equally spaced intervals between -L and L

Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

11 hours ago

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Create logical matrix with a specific row and column sums

Given two numbers *|n|* and *|s|*, build an |n-by-n| logical matrix (of only zeros and ones), such that both the row sums and th...

11 hours ago

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How to sum different cells of cell array

Something like this should work: data={[1,2,3;4,5,6],[3,24,35;46,58,69]; [10,2,3;24,85,6],[11,22,33;54,15,16]}; data=perm...

How to sum different cells of cell array

Something like this should work: data={[1,2,3;4,5,6],[3,24,35;46,58,69]; [10,2,3;24,85,6],[11,22,33;54,15,16]}; data=perm...

16 hours ago | 0

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How to plot vectors with different lenght

You need to make sure your data matches up. You can either remove the x-values you don't have a y for, or add NaN values for tho...

How to plot vectors with different lenght

You need to make sure your data matches up. You can either remove the x-values you don't have a y for, or add NaN values for tho...

16 hours ago | 0

Answered

How to create a string that depends on user input variables?

You can create this text with sprintf and some minor tweaks: str=sprintf('p(%d)*x^%d +', [1:d;(d-1):-1:0]); str=strrep(str...

How to create a string that depends on user input variables?

You can create this text with sprintf and some minor tweaks: str=sprintf('p(%d)*x^%d +', [1:d;(d-1):-1:0]); str=strrep(str...

3 days ago | 0

Answered

Adding numbers in a row vector

You can do it with a for loop, but you should use cumsum instead.

Adding numbers in a row vector

You can do it with a for loop, but you should use cumsum instead.

3 days ago | 0

| accepted

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I keep getting the error "Dimension argument must be a positive integer scalar within indexing range"

The trapz function does not allow an anonymous function as second input. You will need to calculate the y values. f= @(x) 2...

I keep getting the error "Dimension argument must be a positive integer scalar within indexing range"

The trapz function does not allow an anonymous function as second input. You will need to calculate the y values. f= @(x) 2...

3 days ago | 0

| accepted

Answered

I want to make a series using max & mins of this Integral and show that the series converges and has the limit pi/2.

Your code already is making a series. You could add the envelope, but the only thing you're missing in my opinion is adding the ...

I want to make a series using max & mins of this Integral and show that the series converges and has the limit pi/2.

Your code already is making a series. You could add the envelope, but the only thing you're missing in my opinion is adding the ...

5 days ago | 0

| accepted

Solved

Return a list sorted by number of consecutive occurrences

Inspired by Problem 38 by Cody Team. Given a vector x, return a vector y of the values in x sorted by the number of CONSECUTIVE...

6 days ago

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Replicate elements in vectors

Replicate each element of a row vector (with NaN) a constant number of times. Examples n=2, A=[1 2 3] -> [1 1 2 2 3 3] ...

6 days ago

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Get the elements of diagonal and antidiagonal for any m-by-n matrix

In the problem <http://www.mathworks.com/matlabcentral/cody/problems/858-permute-diagonal-and-antidiagonal Problem 858. Permute ...

6 days ago

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Getting the indices from a matrice

Getting the indices from a matrice. Inspired by Problem 645. Getting the indices from a vector by the great Doug Hull. Given a...

6 days ago

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Set the array elements whose value is 13 to 0

Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

6 days ago

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Construct an index vector from two input vectors in vectorized fashion

Create an index vector defined by two input vectors, one defining the beginnings of one or more index ranges, and the other defi...

6 days ago

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create a new 4D Array from 2 others

I think I understand what you mean. The code below will overwrite all values that are not NaN for a given depth, which is equiva...

create a new 4D Array from 2 others

I think I understand what you mean. The code below will overwrite all values that are not NaN for a given depth, which is equiva...

6 days ago | 0

| accepted

Answered

Generating a random number from array based on requirements

A=[1,2,3,4]; p=[10 20 30 40]; c=cumsum(p); isAllowed=[3,4]; while true [~,r]=histc(rand(1,1),[0 c/c(end)]); if ism...

Generating a random number from array based on requirements

A=[1,2,3,4]; p=[10 20 30 40]; c=cumsum(p); isAllowed=[3,4]; while true [~,r]=histc(rand(1,1),[0 c/c(end)]); if ism...

7 days ago | 0

Answered

Graph window is blank

As most of the operation you perform don't work for most shapes of input data, I'm assuming you're calling this code with scalar...

Graph window is blank

As most of the operation you perform don't work for most shapes of input data, I'm assuming you're calling this code with scalar...

7 days ago | 0

Answered

How to write this for loop as a while

Every for-loop can be re-written to a while-loop. y = 0; k = 1; while k<=999 y = y + k*k; k = k + 4; end

How to write this for loop as a while

Every for-loop can be re-written to a while-loop. y = 0; k = 1; while k<=999 y = y + k*k; k = k + 4; end

7 days ago | 1

Answered

Modifying odd/even numbers of a column vector

If you have trouble with Matlab basics you may consider doing the Onramp tutorial (which is provided for free by Mathworks). x ...

Modifying odd/even numbers of a column vector

If you have trouble with Matlab basics you may consider doing the Onramp tutorial (which is provided for free by Mathworks). x ...

7 days ago | 0

| accepted

Answered

Multi Dimension Matrix Elements multiplication

Not completely without loops, but this should be fast enough. You should also be aware that loops can sometimes be the fastest w...

Multi Dimension Matrix Elements multiplication

Not completely without loops, but this should be fast enough. You should also be aware that loops can sometimes be the fastest w...

7 days ago | 0

Answered

How to run function between each row

pairs=nchoosek(1:size(data,1),2); for n=1:size(pairs,1) row_a=data(pairs(n,1),:); row_b=data(pairs(n,2),:); %cal...

How to run function between each row

pairs=nchoosek(1:size(data,1),2); for n=1:size(pairs,1) row_a=data(pairs(n,1),:); row_b=data(pairs(n,2),:); %cal...

7 days ago | 0

Answered

Single line plot with fixed axis

Every axes object has an XScale property you can set to 'log' to get the desired plot. You can use the normal plotting tools (e....

Single line plot with fixed axis

Every axes object has an XScale property you can set to 'log' to get the desired plot. You can use the normal plotting tools (e....

7 days ago | 1

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Answered

How to click points in a figure to generate a function/set of data?

I would suggest getpts, although there is an alternative that gives visual feedback: ginput.

How to click points in a figure to generate a function/set of data?

I would suggest getpts, although there is an alternative that gives visual feedback: ginput.

7 days ago | 0

Answered

how to generate 10^6 random binary values consisting only -1 and 1?

doc randi

how to generate 10^6 random binary values consisting only -1 and 1?

doc randi

8 days ago | 0