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**Content Feed**

Submitted

Draw or add axes to figure

Super helpful way to visualize axes in a 2D figure.

mer än 7 år ago | 1 download |

Submitted

Color-balance demo with GPU computing

Use GPU in MATLAB to perform white-balance operation to input image.

mer än 7 år ago | 3 downloads |

Submitted

Laplacian eigenmap ~ Diffusion map ~ manifold learning

Demo techniques of nonlinear eigenmaps for the purpose of recovering low-dimensional geometries.

mer än 7 år ago | 8 downloads |

Record timing of user input

I think you want |tic| and |toc|, as in the example below: % I will create a cell that represents some collection of images...

nästan 10 år ago | 2

| accepted

how do i vectorise given code?

I do not see how the example you provided will execute if |A| is any standard MATLAB data type. In particular, if |A| is a MA...

mer än 10 år ago | 0

Return specified rows of a vector

Try A = [4;8;2;3;8;6]; i = [1;3;5;6]; B = A(i)

mer än 10 år ago | 1

| accepted

Need half of my contour plot

Check out the |tril| and |triu| functions. For example if you have data similar to [x,y]= meshgrid(-1:.05:1); z = x.^2+...

mer än 10 år ago | 0

| accepted

Question

What would you do?

Suppose you have a string like rhs = 'x*cos(x)/(t+1)'; and that you want to create a function handle... would you do ...

mer än 10 år ago | 2 answers | 0

### 2

answersIs this even possible?

Have you tried right-clicking on the file from the current folder browser? In the context-menu that pops up you should see some...

mer än 10 år ago | 0

Simple Question about Optimization of Nested IF-FOR loops

First of all, it appears that each time through the outer-most loop (the first one), the variable |iPointsinSlice| does not chan...

mer än 10 år ago | 0

Subscript indices must either be real positive integers or logicals

There are several issues you need to resolve with your code before it will run. First, there is no increment operator in MATLAB...

mer än 10 år ago | 0

| accepted

Convert vector to cell array

The third input to the |fints| function is a cell array of strings that can be valid MATLAB identifiers. That is, the strings c...

mer än 10 år ago | 0

| accepted

How to visualize the matrix with colored entries

What are the features that make your data suspicious? For example, if the suspicious data is all very large (say 2 standard dev...

mer än 10 år ago | 0

How to do a 3D circle in matlab

I assume you do not have a parametric form for the circle in 3D, but you do have the equation for the plane where the circle liv...

mer än 10 år ago | 6

Simpl equestion about CUMSUM

I don't think I would use cumsum here. Instead, try A = sum(bsxfun(@gt,B',0:299)); Note, this command above assumes B i...

mer än 10 år ago | 0

| accepted

match the first letter in a cell and save

Try this (I assume your cell is called |variable|) idx = cellfun(@(s)strncmp(s,'P',1),variable) newCell = variable(idx);...

mer än 10 år ago | 0

| accepted

how to remove NaN

You're very close try % idx(i) is true if contents in row i, column 6 of M equals NaN idx = cellfun(@isnan,M(:,6)) ...

mer än 10 år ago | 1

PLOT COMMAND USING string arguments

Maybe try x = eval(get(text1,'string')); y = eval(get(text2,'string')); axes(plot1); plot(x,y);

mer än 10 år ago | 0

| accepted

calculate a vector from consecutive vectors without a loop

Totally.. try something like yourVector = 1:100; avgWindow = 1/10*ones(1,10); % each value is 1/10 movingAverage ...

mer än 10 år ago | 1

| accepted

Sliders in Matlab GUI

Check out this simple function.. you should be able to copy and paste it into a new file, save the file with the name |simplePro...

mer än 10 år ago | 0

| accepted

lines to curves drawing problem

I assume you have the variables |x| and |y| which are vectors representing the values in the x-component and in the y-component ...

mer än 10 år ago | 2

| accepted

Create an image stack (3-D matrix)

Execute this command after your code above to get the three gray-scale images you create into one 3D matrix of grayscale image...

mer än 10 år ago | 0

| accepted

create a function handle extracting pieces from a matrix function handle

Starting from your example A = @(x) [1 2 x; 2*x x.^2 3]; you probably realized that *this command is not allowed* B...

mer än 10 år ago | 1

| accepted

How can I calculate and compare the energy of the curvelet coefficients to compare in thresholding code?

When you decompose a function |f| in an orthonormal basis, you can relate the sum of the square of the coefficients to the L2-no...

mer än 10 år ago | 0

| accepted

Matrix is close to singular or badly scaled

There is a closed form expression for the inverse of a 2-by-2 matrix <http://mathworld.wolfram.com/MatrixInverse.html here> (see...

mer än 10 år ago | 1

| accepted

Loop variable names and file names

Check your |for|-loop. The iteration variable is |iName|, but you use |i| in the loop's body. Since you do not define |i|, MATL...

mer än 10 år ago | 0

| accepted

How do I add a 2D Plot along with a surface or mesh plot in MATLAB?

Does this get you started? % create figure figure % Generate data to make a surface x = -1:0.1:1; y = -1:0...

mer än 10 år ago | 1

| accepted

second order nonlinear ode with polynomial terms

You must write the ODE as a system of first-order ODEs. Use the substitution u1 = y and u2 = y'. Then, you'll end up with equa...

mer än 10 år ago | 0

Force polynomial fit through multiple points

I assume your data is given by two row vectors xData and yData, given for example by xData = linspace(-2,2); yData = 2.3...

mer än 10 år ago | 2

solving non linear third order algebaric expressions using newton rapson method or any other method!!!

The |fsolve| function needs a function handle as input. So create a file with the command edit yourFun.m and paste this...

mer än 10 år ago | 0