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已回答
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...
10 years 前 | 6
| 已接受
提问
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 ...
10 years 前 | 1 个回答 | 0
1
个回答已回答
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)...
10 years 前 | 0
| 已接受
已回答
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 =...
10 years 前 | 2
| 已接受
已回答
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);
10 years 前 | 0
已回答
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...
10 years 前 | 0
已回答
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...
10 years 前 | 7
已回答
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; ...
10 years 前 | 0
已回答
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...
10 years 前 | 0
已回答
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...
10 years 前 | 1
| 已接受
已回答
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 ...
10 years 前 | 3
已回答
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
10 years 前 | 1
| 已接受
已回答
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...
10 years 前 | 0
| 已接受
已回答
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'''; %...
10 years 前 | 0
已回答
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...
10 years 前 | 0
| 已接受
已回答
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....
10 years 前 | 1
已回答
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...
10 years 前 | 2
| 已接受
已回答
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);
10 years 前 | 1
| 已接受
已回答
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...
10 years 前 | 1
| 已接受
已回答
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...
10 years 前 | 1
| 已接受
已回答
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 ...
10 years 前 | 2
已回答
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 ...
10 years 前 | 0
| 已接受
已回答
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])
11 years 前 | 0
已回答
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...
11 years 前 | 0
| 已接受
已解决
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...
11 years 前
已解决
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...
11 years 前
已解决
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=...
11 years 前
已解决
Vectorizing, too easy or too hard?
Please insert a . before any ^, * or / in the string. That's it!!
11 years 前
已解决
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...
11 years 前
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