Answered

Synchronise real time to simulation time

If you use the "sim" command to run a simulink model, via matlab code, you can use tic & toc to measure how long it took to comp...

Synchronise real time to simulation time

If you use the "sim" command to run a simulink model, via matlab code, you can use tic & toc to measure how long it took to comp...

6 years ago | 0

Answered

average of each two vectors of a matrix

(x(2:2:10,:) + x(1:2:9,:))/2 Thats the "simple" answer. There are other methods that are more flexible, but which need a lit...

average of each two vectors of a matrix

(x(2:2:10,:) + x(1:2:9,:))/2 Thats the "simple" answer. There are other methods that are more flexible, but which need a lit...

6 years ago | 1

| accepted

Answered

Undefined function 'times' for input arguments of type 'cell'

When you want to access the contents of "M", you need to access it like this: M{:,1}

Undefined function 'times' for input arguments of type 'cell'

When you want to access the contents of "M", you need to access it like this: M{:,1}

6 years ago | 0

| accepted

Answered

'for loop' for beginners?

The error is because you're trying to get the user to enter a list of numbers with a function that only allows ONE number to be ...

'for loop' for beginners?

The error is because you're trying to get the user to enter a list of numbers with a function that only allows ONE number to be ...

6 years ago | 0

Answered

Best way to nest parfoor in for loops?

There are a few things to consider - 1. Is each loop iteration entirely independent of the prior ones? - If not, you can't ...

Best way to nest parfoor in for loops?

There are a few things to consider - 1. Is each loop iteration entirely independent of the prior ones? - If not, you can't ...

6 years ago | 1

| accepted

Answered

help with this basic matlab code..

The answer you're looking for is actually really really really horrible: Mean_process_cut_cut_image_posi = rot90(cut_2,3); ...

help with this basic matlab code..

The answer you're looking for is actually really really really horrible: Mean_process_cut_cut_image_posi = rot90(cut_2,3); ...

6 years ago | 0

Answered

generate random numbers with exact mean and std

A sequence of equal numbers of -1 and 1 has a mean of 0 and a population standard deviation of precisely 1. That sequence of...

generate random numbers with exact mean and std

A sequence of equal numbers of -1 and 1 has a mean of 0 and a population standard deviation of precisely 1. That sequence of...

6 years ago | 0

Answered

Problem with logical indexing with arbitrary indices

aarray(find(r(1,1)==1)) = bindices(end); A. That's not logical indexing. r(1,1) == 1 can only return a scalar logical ...

Problem with logical indexing with arbitrary indices

aarray(find(r(1,1)==1)) = bindices(end); A. That's not logical indexing. r(1,1) == 1 can only return a scalar logical ...

6 years ago | 0

Answered

what's the difference between handles and hObject?

handles is a structure holding ALL of the handles for the GUI. hObject, is JUST the handle for the GUI object used. eventd...

what's the difference between handles and hObject?

handles is a structure holding ALL of the handles for the GUI. hObject, is JUST the handle for the GUI object used. eventd...

6 years ago | 3

Answered

Performance of structures as function arguments

Yes. The "Good reason", is that an equation, say, L = 1/2 * rho * Vel.^2 * area * (alpha*P1 + P0); Is far quicker to...

Performance of structures as function arguments

Yes. The "Good reason", is that an equation, say, L = 1/2 * rho * Vel.^2 * area * (alpha*P1 + P0); Is far quicker to...

6 years ago | 0

| accepted

Answered

how to value nan number in a vector? and how to do the same calc in a 2d matrix?

You've got an x & y vector, so this would remove the NaNs: nans = isnan(Y) || isnan(X); Y(nans) = []; X(nans) = []; ...

how to value nan number in a vector? and how to do the same calc in a 2d matrix?

You've got an x & y vector, so this would remove the NaNs: nans = isnan(Y) || isnan(X); Y(nans) = []; X(nans) = []; ...

6 years ago | 0

Answered

Split a matrix into a two submatrixes by a condition

This is the "simple" answer: male = ex3(find(ex3(:,1) == 1),:); female = ex3(find(ex3(:,1) == 0),:);

Split a matrix into a two submatrixes by a condition

This is the "simple" answer: male = ex3(find(ex3(:,1) == 1),:); female = ex3(find(ex3(:,1) == 0),:);

6 years ago | 0

Answered

How can I cast 4 octets in 32bit signed integer type ?

typecast(uint8([1 2 3 4]),'int32')

How can I cast 4 octets in 32bit signed integer type ?

typecast(uint8([1 2 3 4]),'int32')

6 years ago | 0

Answered

The role of singleton elements in calls to the zeros function.

Matlab only really needs to know which dimensions are "nonsingular". - A scalar has infinite dimensions, all with a size of 1. ...

The role of singleton elements in calls to the zeros function.

Matlab only really needs to know which dimensions are "nonsingular". - A scalar has infinite dimensions, all with a size of 1. ...

6 years ago | 0

Answered

Missile guidance system not reaching target

You're missing something. Heres a multiple choice question that'll suit- Do you want your missile to explode? A. afte...

Missile guidance system not reaching target

You're missing something. Heres a multiple choice question that'll suit- Do you want your missile to explode? A. afte...

6 years ago | 0

Answered

Need help figuring out how to save values

As it's homework, I'll just say the keyword you want. persistent

Need help figuring out how to save values

As it's homework, I'll just say the keyword you want. persistent

6 years ago | 0

Answered

how can remove corner of binary image??

If you repeatedly erode & dilate (imerode & imdilate) the image you should get close to what you want if you use the right "neig...

how can remove corner of binary image??

If you repeatedly erode & dilate (imerode & imdilate) the image you should get close to what you want if you use the right "neig...

6 years ago | 0

| accepted

Answered

Transfer and execute function

I don't quite get what you're asking: Are you saying that you want to use a variable function for something? In which case yo...

Transfer and execute function

I don't quite get what you're asking: Are you saying that you want to use a variable function for something? In which case yo...

6 years ago | 0

Answered

How to keep precision of Math Operations?

You are probably getting more than 2 decimal places of "accuracy". You're probably getting 15 or 16 significant figures worth of...

How to keep precision of Math Operations?

You are probably getting more than 2 decimal places of "accuracy". You're probably getting 15 or 16 significant figures worth of...

6 years ago | 0

Answered

Is there any way to do an operator on a specific region

A simple way is to simply chop it off: % (Tune the numbers for what you need) LowerLeftquad = my_image(74:end,1:30); % ass...

Is there any way to do an operator on a specific region

A simple way is to simply chop it off: % (Tune the numbers for what you need) LowerLeftquad = my_image(74:end,1:30); % ass...

6 years ago | 0

Answered

How can I integrate something times a function file?

This example uses "sin", instead of whatever function you're using to get your integrand. to_be_integrated = @(x)(sin(x).^2*...

How can I integrate something times a function file?

This example uses "sin", instead of whatever function you're using to get your integrand. to_be_integrated = @(x)(sin(x).^2*...

6 years ago | 0

Answered

Count equal values in multiple matrices

If you can concatenate your matrices in the 3rd dimension: x_oth = X2; x_oth(:,:,2) = X3; ... Then you may be able ...

Count equal values in multiple matrices

If you can concatenate your matrices in the 3rd dimension: x_oth = X2; x_oth(:,:,2) = X3; ... Then you may be able ...

6 years ago | 0

Answered

Reading text from an excel file and populating a matrix with those values.

[numbers_only text_only both] = xlsread(filename,sheet_4); Then one of: network_station_coordinates = numbers_only; % ...

Reading text from an excel file and populating a matrix with those values.

[numbers_only text_only both] = xlsread(filename,sheet_4); Then one of: network_station_coordinates = numbers_only; % ...

6 years ago | 0

| accepted

Answered

How to change the name of variables using a loop?

Cells ARE the way to go. Structures would be preferable to what you want mystruct.description = 'blah blah'; mystruc...

How to change the name of variables using a loop?

Cells ARE the way to go. Structures would be preferable to what you want mystruct.description = 'blah blah'; mystruc...

6 years ago | 1

Answered

Goto command in matlab: Undefined function 'goto' for input arguments of type 'double'"

Ok, so you've downloaded a function "goto" from the file exchange, and it's probably just using "eval" on every line from the on...

Goto command in matlab: Undefined function 'goto' for input arguments of type 'double'"

Ok, so you've downloaded a function "goto" from the file exchange, and it's probably just using "eval" on every line from the on...

6 years ago | 1

Answered

How do I find the Nth high number in a matrix A ?

values = 1:500; sorted = sort(values,'descend'); sorted(5)

How do I find the Nth high number in a matrix A ?

values = 1:500; sorted = sort(values,'descend'); sorted(5)

6 years ago | 0

Answered

Make a connection between MATLAB-VISUAL BASIC via ActiveX as a bridge,

Using activeX is a bit of a pain. HOWEVER, if you look at the code for xlsread/xlswrite, you'll see that there is a whole load o...

Make a connection between MATLAB-VISUAL BASIC via ActiveX as a bridge,

Using activeX is a bit of a pain. HOWEVER, if you look at the code for xlsread/xlswrite, you'll see that there is a whole load o...

6 years ago | 1

| accepted

Answered

getting error of not enough input argument?

gumbelpdf, gumbelcdf, gumbelinv are all functions that we don't have, so we can only say how to fix your error properly gumbe...

getting error of not enough input argument?

gumbelpdf, gumbelcdf, gumbelinv are all functions that we don't have, so we can only say how to fix your error properly gumbe...

6 years ago | 0

Answered

Opening many excel files into different matrices

A cell array would be ideal. Example: list = {'file1.xls','C:\data\file2.xls', ....}; for i = 1:numel(list) data{i} = x...

Opening many excel files into different matrices

A cell array would be ideal. Example: list = {'file1.xls','C:\data\file2.xls', ....}; for i = 1:numel(list) data{i} = x...

6 years ago | 1

| accepted