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 ...

12 years ago

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...

12 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 ...

12 years ago

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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...

12 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.

12 years ago

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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...

12 years ago

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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 ...

12 years ago

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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:...

12 years ago

Answered

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. ...

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. ...

12 years ago | 0

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Answered

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...

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...

12 years ago | 0

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Answered

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...

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...

12 years ago | 5

| accepted

Answered

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 ...

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 ...

12 years ago | 10

Answered

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...

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...

12 years ago | 0

| accepted

Answered

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...

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...

12 years ago | 28

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Answered

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...

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...

12 years ago | 0

Answered

checking of existing an string in a cell arrays

if ~any(strcmp(CELL,'a')) % Do Something else % Do Something else end

checking of existing an string in a cell arrays

if ~any(strcmp(CELL,'a')) % Do Something else % Do Something else end

12 years ago | 37

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Answered

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)

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)

12 years ago | 0

Answered

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...

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...

12 years ago | 3

Answered

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...

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...

12 years ago | 4

| accepted

Answered

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...

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...

12 years ago | 0

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Answered

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 ...

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 ...

12 years ago | 1

Answered

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

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

12 years ago | 0

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Answered

transposing the contents of the cell

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

transposing the contents of the cell

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

12 years ago | 2

| accepted

Answered

spline? interp?

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

spline? interp?

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

12 years ago | 0

Answered

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...

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...

12 years ago | 0

Answered

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...

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...

12 years ago | 20

| accepted

Answered

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);

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);

12 years ago | 1

| accepted

Answered

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...

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...

12 years ago | 2

| accepted