Answered

How to classify shapes of this image as square, rectangle, triangle and circle?

Another approach is to calculate the best-fit bounding rectangle of each object, such that the bounding rectangle can be oriente...

How to classify shapes of this image as square, rectangle, triangle and circle?

Another approach is to calculate the best-fit bounding rectangle of each object, such that the bounding rectangle can be oriente...

mer än 6 år ago | 6

| accepted

Question

Determine which function was used to generate hggroup?

Hello everyone, Is there a way to determine which function (e.g., quiver(), scatter(), contour(), etc.) was used to generate ...

mer än 6 år ago | 1 answer | 0

Answered

How to average a column based on another column?

This is a good use of accumarray(): [ud,ix,iy]=unique( data(:,1)); output = [ud, accumarray(iy,data(:,2),[],@mean)...

How to average a column based on another column?

This is a good use of accumarray(): [ud,ix,iy]=unique( data(:,1)); output = [ud, accumarray(iy,data(:,2),[],@mean)...

mer än 6 år ago | 0

| accepted

Answered

How can I write a program to investigate whether a number belongs to matrix?

I think ismember() should do the trick: A=[1 2 3 5 21 2 4 0 11 3]; B = 11; C = ismember(B, A); %returns 1 B =...

How can I write a program to investigate whether a number belongs to matrix?

I think ismember() should do the trick: A=[1 2 3 5 21 2 4 0 11 3]; B = 11; C = ismember(B, A); %returns 1 B =...

nästan 7 år ago | 2

| accepted

Answered

Creating an array of datenum(s)

If I understand you correctly, this should do it: [~, time_index] = ismember( datenum(tv), second_tv);

Creating an array of datenum(s)

If I understand you correctly, this should do it: [~, time_index] = ismember( datenum(tv), second_tv);

nästan 7 år ago | 0

Answered

How to convert an image from rgb to lab by pixel by pixel matrix???

You can convert rgb to L*A*B colorspace using the makecform() and applycform() functions. From the documentation: cform...

How to convert an image from rgb to lab by pixel by pixel matrix???

You can convert rgb to L*A*B colorspace using the makecform() and applycform() functions. From the documentation: cform...

nästan 7 år ago | 0

Answered

Is there a way to disconnect lines between data points while utilizing the plot function?

Another way is to insert a NaN between the dis-connected points, such as: x = [1;2;3;4;5;6;7;8;6]; y = [10;20;30;40;50;6...

Is there a way to disconnect lines between data points while utilizing the plot function?

Another way is to insert a NaN between the dis-connected points, such as: x = [1;2;3;4;5;6;7;8;6]; y = [10;20;30;40;50;6...

nästan 7 år ago | 5

Answered

How to calculate the median for each day of the year in 91 years?

I think this is a good use of accumarray(). %some sample data, to illustrate approach Data = [1915 1 1 1000 1010; ...

How to calculate the median for each day of the year in 91 years?

I think this is a good use of accumarray(). %some sample data, to illustrate approach Data = [1915 1 1 1000 1010; ...

ungefär 7 år ago | 0

Answered

Finding minimum point from any function file input.

I would check out the documentation for fminsearch() and fminbnd(), or if you have the Optimization Toolbox, fminunc(): doc...

Finding minimum point from any function file input.

I would check out the documentation for fminsearch() and fminbnd(), or if you have the Optimization Toolbox, fminunc(): doc...

ungefär 7 år ago | 0

Answered

How do I find values in a matrix which are closest to an integer which is the product of a given value?

I think I get what you are trying to do. I think the easiest way might be to use interpolation to fill in the missing values, as...

How do I find values in a matrix which are closest to an integer which is the product of a given value?

I think I get what you are trying to do. I think the easiest way might be to use interpolation to fill in the missing values, as...

ungefär 7 år ago | 1

| accepted

Answered

Read data from text file

You should be able to do it with textscan fid = fopen('/path/to/your/file.txt', 'rt'); output = textscan(fid, '%s %s %f ...

Read data from text file

You should be able to do it with textscan fid = fopen('/path/to/your/file.txt', 'rt'); output = textscan(fid, '%s %s %f ...

ungefär 7 år ago | 2

Answered

and another "if" statement question

How long is the vector? Would this work? if all(A>3) %do something else %do other thing end

and another "if" statement question

How long is the vector? Would this work? if all(A>3) %do something else %do other thing end

ungefär 7 år ago | 1

| accepted

Answered

how to get some values from many text files and put them into the calculation ( please help)

One approach using regular expressions: %variables to average over AveVariables = {'Area', 'xbar', 'ybar', 'IXXw', 'IYY...

how to get some values from many text files and put them into the calculation ( please help)

One approach using regular expressions: %variables to average over AveVariables = {'Area', 'xbar', 'ybar', 'IXXw', 'IYY...

ungefär 7 år ago | 0

| accepted

Answered

how to write program for following problem

I'm not going to given you the entire code, but to get you started, here's how you can do the parse: a = 'AD''BA''C'''; %...

how to write program for following problem

I'm not going to given you the entire code, but to get you started, here's how you can do the parse: a = 'AD''BA''C'''; %...

ungefär 7 år ago | 0

Answered

levenberg-marquardt in lsqcurvefit

Pass in an options structure: opts = optimset('Algorithm', 'levenberg-marquardt'); [parameters,resnorm,residual,exitflag...

levenberg-marquardt in lsqcurvefit

Pass in an options structure: opts = optimset('Algorithm', 'levenberg-marquardt'); [parameters,resnorm,residual,exitflag...

ungefär 7 år ago | 0

| accepted

Answered

Updating bounds in fmincon

You can implement the constraints on psi as a linear inequality constraint. If you check the documentation for your solver (e.g....

Updating bounds in fmincon

You can implement the constraints on psi as a linear inequality constraint. If you check the documentation for your solver (e.g....

ungefär 7 år ago | 1

Answered

How do I create variable names from string variables

If you can, avoid doing this. This explains why: <http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA...

How do I create variable names from string variables

If you can, avoid doing this. This explains why: <http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA...

ungefär 7 år ago | 2

| accepted

Answered

Creating a matrix using a loop

[xx,yy]=ndgrid( -2:1:2, -2:1:2); xy = [xx(:), yy(:)]; x = xy(:,1); y = xy(:,2);

Creating a matrix using a loop

[xx,yy]=ndgrid( -2:1:2, -2:1:2); xy = [xx(:), yy(:)]; x = xy(:,1); y = xy(:,2);

ungefär 7 år ago | 1

| accepted

Answered

How to Multiply value in adjacent cell by cell above, Autofil formula in Matlab?

There is no generic "autofill" command. For the example you've given, the following logic would work: StartVar = 5; mult...

How to Multiply value in adjacent cell by cell above, Autofil formula in Matlab?

There is no generic "autofill" command. For the example you've given, the following logic would work: StartVar = 5; mult...

ungefär 7 år ago | 1

| accepted

Answered

using multiselect uigetfile with dicomread

You probably need to pass in the full path to your DICOM file to dicomread(). Try this: for count = 1:numel(name) imag...

using multiselect uigetfile with dicomread

You probably need to pass in the full path to your DICOM file to dicomread(). Try this: for count = 1:numel(name) imag...

ungefär 7 år ago | 0

| accepted

Answered

Error using textread to read data containing "INF" or "NaN" with float data

Try using textscan() with the 'TreatAsEmpty' option: output = textscan([direct filename], '%22c %u %f %f %f %f %f %f %f %f ...

Error using textread to read data containing "INF" or "NaN" with float data

Try using textscan() with the 'TreatAsEmpty' option: output = textscan([direct filename], '%22c %u %f %f %f %f %f %f %f %f ...

ungefär 7 år ago | 2

Answered

How to read from a *.txt file to assign variables and paths

Easiest way is to parse with regular expressions and read into an output structure with named fields. %read in file str ...

How to read from a *.txt file to assign variables and paths

Easiest way is to parse with regular expressions and read into an output structure with named fields. %read in file str ...

ungefär 7 år ago | 0

| accepted

Answered

Solving ODEs using matlab (ode45)

Did you forget the assignment sign? [T, XY] = ode45 ('diffxy', 0 10, [0 1 0])

Solving ODEs using matlab (ode45)

Did you forget the assignment sign? [T, XY] = ode45 ('diffxy', 0 10, [0 1 0])

mer än 7 år ago | 0

Answered

choose data points that nears each other and store in different matrix

One (non-loop) way: [x1,x2]=meshgrid(A(:,1)); [y1,y2]=meshgrid(A(:,2)); D = sqrt((x1-x2).^2+(y1-y2).^2); %distance m...

choose data points that nears each other and store in different matrix

One (non-loop) way: [x1,x2]=meshgrid(A(:,1)); [y1,y2]=meshgrid(A(:,2)); D = sqrt((x1-x2).^2+(y1-y2).^2); %distance m...

mer än 7 år ago | 0

| accepted

Solved

Read a column of numbers and interpolate missing data

Given an input cell array of strings s, pick out the second column and turn it into a row vector of data. Missing data will be i...

mer än 7 år ago

Solved

Fibonacci sequence

Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

mer än 7 år ago

Solved

Relative ratio of "1" in binary number

Input(n) is positive integer number Output(r) is (number of "1" in binary input) / (number of bits). Example: * n=0; r=...

mer än 7 år ago

Solved

Vectorizing, too easy or too hard?

Please insert a . before any ^, * or / in the string. That's it!!

mer än 7 år ago

Solved

Specific Element Count

Given a vector _v_ and a element _e_, return the number of occurrences of _e_ in _v_. Note: NaNs are equal and there may be n...

mer än 7 år ago