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# blaat

### Technische Universiteit Delft

195 total contributions since 2012

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Construct optimisation constraints vector with anonymous function.
You can also call functions within an anonymous function, e.g., param1 = 6; param2 = 0.5; nlcon = @(x)calculateconstr...

meer dan 4 jaar ago | 0

How to remove the least significant bit of a signed int16
You could use |bitset()| to set the LSB to 0, but they will still be 16-bits in memory. For example: a = [56, 21, 33]; b...

meer dan 4 jaar ago | 0

| accepted

Why does rgb2gray use these weights for the weighted sum?
These values come from the <http://www.itu.int/rec/R-REC-BT.601-7-201103-I/en BT.601> standard for use in colour video encoding,...

meer dan 4 jaar ago | 1

How to select and crop a particular region from the image?
If you have the Image Processing Toolbox, you can use the function <http://www.mathworks.com/help/images/ref/imrect.html |imrect...

meer dan 4 jaar ago | 0

| accepted

HOW TO GET KEY PRESS INSTANCE
The key last pressed in the figure is given by its |CurrentCharacter| property, which can be obtain by: key = get(h_fig, 'C...

meer dan 4 jaar ago | 0

Is there any way to import back figures that you initially exported from MATLAB?
Unfortunately, your figure was converted to a rasterised image when you pasted it in Microsoft Word - this process is irreversib...

meer dan 4 jaar ago | 0

How to draw orthogonal lines ?
The line between your two points can be described by y = a (x - x1) + b, where a = (y2 - y1)/(x2 - x1) b = y1, ...

meer dan 4 jaar ago | 0

For loop with changing matrix
You could use a cell array to store the ages per |j|. For example: B = cell(1, years); for j = 1:years % A is compu...

meer dan 4 jaar ago | 0

What is the difference between double() and im2double() ?
The function double() only converts the specified array to a variable of type double, keeping the same values. The function im2d...

meer dan 4 jaar ago | 0

| accepted

Solved

Area of an Isoceles Triangle
An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<http://upload...

ongeveer 5 jaar ago

Solved

Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

ongeveer 5 jaar ago

Solved

Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

ongeveer 5 jaar ago

Solved

Is this triangle right-angled?
Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

ongeveer 5 jaar ago

Solved

Compute a dot product of two vectors x and y
x and y are input vectors, d is a number and contains their dot product

bijna 7 jaar ago

Solved

*Description* The Soroban is the name of the modern Japanese abacus. Information on reading a Soroban can be found <http://we...

bijna 7 jaar ago

Solved

Find the largest value in the 3D matrix
Given a 3D matrix, A, find the largest value. E.g. >> A = 1:9; >> A=reshape(A,[3 1 3]); >> islargest(A) ans = 9

bijna 7 jaar ago

Solved

Flip the main diagonal of a matrix
Given a n x n matrix, M, flip its main diagonal. Example: >> M=magic(5); >> flipDiagonal(M) 9 24 1 ...

bijna 7 jaar ago

Solved

Back to basics 17 - white space
Covering some basic topics I haven't seen elsewhere on Cody. Remove the trailing white spaces from the input variable

bijna 7 jaar ago

Solved

Who knows the last digit of pi?
There is only one man who knows the last digit of pi, who is that man? Give the name of that man, who, by popular believe, can ...

bijna 7 jaar ago

Solved

2 b | ~ 2 b
Given a string input, output true if there are 2 b's in it, false if otherwise Examples: 'Macbeth' -> false 'Publius Cor...

bijna 7 jaar ago

Solved

Back to basics 20 - singleton dimensions
Covering some basic topics I haven't seen elsewhere on Cody. Remove the singleton dimensions from the input variable (e.g. if...

bijna 7 jaar ago

Solved

Determine Whether an array is empty
Input a matrix x, output y is TRUE if x is empty, otherwise FALSE.

bijna 7 jaar ago

Solved

Number of 1s in a binary string
Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

bijna 7 jaar ago

Solved

Back to basics 21 - Matrix replicating
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, generate an output matrix that consists o...

bijna 7 jaar ago

Solved

Back to basics 7 - Equal NaNs
Covering some basic topics I haven't seen elsewhere on Cody. Given 2 input variables, output true if they are equal, false ot...

bijna 7 jaar ago

Solved

Convert a vector into a number
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

bijna 7 jaar ago

Solved

Given a window, how many subsets of a vector sum positive
Given a vector: [1 0 -1 3 2 -3 1] and a window of 2, A sliding window would find: 1 + 0 = 1 0 - 1 = -1 ...

bijna 7 jaar ago

Solved

Back to basics 23 - Triangular matrix
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, return a matrix with all elements above a...

bijna 7 jaar ago

Solved

Get the length of a given vector
Given a vector x, the output y should equal the length of x.

bijna 7 jaar ago

Solved

Back to basics 9 - Indexed References
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix and row and column, output the index of th...

bijna 7 jaar ago