Solved

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...

presque 10 ans ago

Solved

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 ...

presque 10 ans ago

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...

presque 10 ans ago

Solved

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

presque 10 ans ago

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...

presque 10 ans 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 ...

presque 10 ans 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:...

presque 10 ans ago

Using uiimport and subsequent coded commands
Hi Jason, In order for your code to wait until uiimport has finished, make sure you request a return value from uiimport. ...

environ 10 ans ago | 0

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Remove ObsNames from MatLab dataset
The property ObsNames may be empty. Otherwise, it should have as many strings as observations. To remove these ObsNames from a d...

environ 10 ans ago | 0

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How to measure running time of a code using MATLAB
Take a look at the <http://www.mathworks.es/help/techdoc/ref/tic.html tic> and <http://www.mathworks.es/help/techdoc/ref/toc.htm...

environ 10 ans ago | 4

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Select a random number from a set
There are a few ways to do it. For example, using randi to select in which position is the card that you will extract. pos ...

environ 10 ans ago | 9

Neural Network code
Your code is basically creating a network with only one layer of neurons. With newfit this means that the network is trying to f...

plus de 10 ans ago | 0

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how to find distance between two points?
You can use the <http://www.mathworks.es/help/toolbox/stats/pdist.html pdist> function in the Statistics Toolbox: e.g: distance...

plus de 10 ans ago | 27

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how to separate out the lung sounds from heart sounds ?
You can use adaptfilt in the DSP toolbox for adaptive noise canceling. A "similar" <http://www.mathworks.com/products/dsp-system...

plus de 10 ans ago | 0

checking of existing an string in a cell arrays
if ~any(strcmp(CELL,'a')) % Do Something else % Do Something else end

plus de 10 ans ago | 29

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create vector of repeating elements (sort of)
One of many ways: >> w = 3; n = 8; >> v = repmat(1:n,w,1); >> v = v(1:end)

plus de 10 ans ago | 0

Angle between two vectors in 3d
You can use the subspace function to find the angle between two subspaces: >> subspace([1;0;0],[0;1;0]) ans = 1...

plus de 10 ans ago | 3

Combining vectors of day, month and year into a single date vector
dates = datenum([year,month,day]); Then you can plot your data vs. dates. Finally, use |datetick| to change the format o...

plus de 10 ans ago | 3

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Error Message when using configured ANN (mismatch number of inputs)
The functions for creating networks in the toolbox will assume that if your input matrix is |n x m| it will represent |m| sample...

plus de 10 ans ago | 0

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How to define the abstract symbolic of 'f=f(x,y,z)' at Matlab-Smbolic.
You can do the following: >> syms x y z; >> f = sym('f(x,y,z)'); >> g = x * f + y * f^2 + z; >> jacobian(g, [x,y,z]) ans ...

plus de 10 ans ago | 1

find max of a vector between two indice
>> C = arrayfun(@(x) max(B(A(x):A(x+1))),1:length(A)-1) C = 2 9

plus de 10 ans ago | 0

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Eliminate duplicate values in a row!
unique(A)

plus de 10 ans ago | 0

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transposing the contents of the cell
Let |C| be your cell. You can do the following: C = cellfun(@transpose,C,'un',0);

plus de 10 ans ago | 2

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spline? interp?
Do you have the curve fitting toolbox? If so, you can try using the functions |cscvn| for interpolating the spline and |fnplt|...

plus de 10 ans ago | 0

Kohonen (example from help does not work)
Which release are you using? There is a known bug in R2010b and R2011a regarding newc and competlayer. <http://www.mathworks.co...

plus de 10 ans ago | 0

Neural Network - Multi Step Ahead Prediction
Hi Jack, When using |narxnet|, the network performs only a one-step ahead prediction after it has been trained. Therefore, yo...

plus de 10 ans ago | 19

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Converting a complex number to polar form and finding it's magnitude
r = abs(z); theta = atan2(imag(z),real(z)); Also... r = abs(z); theta = angle(z);

plus de 10 ans ago | 1

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complex numbers in Symbolic Toolbox
*[Updated]* Define the symbolic variables as real and use the function |simplify| when needed: >> syms a b c d real; >> F=a...

plus de 10 ans ago | 2

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how to increase iteration limit in glmfit ?
Iteration limit is set to 100 in glmfit. You cannot change it unless you edit the function and change it manually (type |edit gl...

plus de 10 ans ago | 0

| accepted