Answered

How do I extract the HH:MM:SS.FFF portion of a julian day time stamp?

times = regexp(Data_Time_Stamps_Cells, '\d{1,2}:\d{2}:\d{2}\.\d{3}', 'match', 'once'); But you might as well do cellfun(@(D) D...

How do I extract the HH:MM:SS.FFF portion of a julian day time stamp?

times = regexp(Data_Time_Stamps_Cells, '\d{1,2}:\d{2}:\d{2}\.\d{3}', 'match', 'once'); But you might as well do cellfun(@(D) D...

30 minutes ago | 0

Answered

How can I change range codes in to conditional?

for Vector = randi ([0,99],1,10000) At any one time, Vector is going to be a scalar. That makes the name misleading, but it is ...

How can I change range codes in to conditional?

for Vector = randi ([0,99],1,10000) At any one time, Vector is going to be a scalar. That makes the name misleading, but it is ...

37 minutes ago | 0

Answered

can't get ny script running. What could be the problem?

w=a*randn(350,1); so w is length 350 n = 400000; for i = 1 : n so i will go to 400000 resultant(k)=proc_1(k)+w(k); k is no...

can't get ny script running. What could be the problem?

w=a*randn(350,1); so w is length 350 n = 400000; for i = 1 : n so i will go to 400000 resultant(k)=proc_1(k)+w(k); k is no...

1 hour ago | 0

Answered

Creating Matlab plot with multiple mesh models, only one with CDATA

surf(x1, y1, z1, c1); hold on surf(x2, y2, z2, c2); surf(x3, y3, z3, 'facecolor', 'g') hold off

Creating Matlab plot with multiple mesh models, only one with CDATA

surf(x1, y1, z1, c1); hold on surf(x2, y2, z2, c2); surf(x3, y3, z3, 'facecolor', 'g') hold off

1 hour ago | 0

Answered

Converting a mathematica if statement

f = (abs(x) <= abs(y)).*sign(y); Which can be done in vectorized form. k_x = A*f; k_y = -k_x; k_z = zeros(size(k_x)); No lo...

Converting a mathematica if statement

f = (abs(x) <= abs(y)).*sign(y); Which can be done in vectorized form. k_x = A*f; k_y = -k_x; k_z = zeros(size(k_x)); No lo...

2 hours ago | 0

Answered

How to write cell array to excel file

If the desired output is a worksheet in which the first column has 10 rows, and the second column has 5 rows, and then the next ...

How to write cell array to excel file

If the desired output is a worksheet in which the first column has 10 rows, and the second column has 5 rows, and then the next ...

3 hours ago | 1

Answered

Error in multiplying corresponding elements in matrices

syms x y h k That is equivalent to x = sym('x'); which would create x as a 1 x 1 symbolic variable. for i = 2:(N+1); x(...

Error in multiplying corresponding elements in matrices

syms x y h k That is equivalent to x = sym('x'); which would create x as a 1 x 1 symbolic variable. for i = 2:(N+1); x(...

3 hours ago | 0

Answered

How to build a matrix with "sum" function in its elements?

sxb = C(b) .* cumsum(A.^(1:p)) .'; You might then want to Sub = flipud(hankel(flipud(sxb)))

How to build a matrix with "sum" function in its elements?

sxb = C(b) .* cumsum(A.^(1:p)) .'; You might then want to Sub = flipud(hankel(flipud(sxb)))

3 hours ago | 0

Answered

How can I modify a command from the command window?

In the command window, press up-arrow repeatedly until it offers you the command you wish to edit. Then use the arrow keys or mo...

How can I modify a command from the command window?

In the command window, press up-arrow repeatedly until it offers you the command you wish to edit. Then use the arrow keys or mo...

3 hours ago | 0

Answered

Increase brightness in part of an image

Depending on how you are constructing your "complex geometry", sometimes you can construct masks to select pixels. For example y...

Increase brightness in part of an image

Depending on how you are constructing your "complex geometry", sometimes you can construct masks to select pixels. For example y...

4 hours ago | 0

| accepted

Answered

Accessing elements of the matrices from an array of matrices

You cannot do that. Once you construct matrix = [A B C D] then MATLAB throws away all information about how the matrix was const...

Accessing elements of the matrices from an array of matrices

You cannot do that. Once you construct matrix = [A B C D] then MATLAB throws away all information about how the matrix was const...

4 hours ago | 0

| accepted

Answered

How do I solve a system of ODE with time-dependent parameters ( as discrete points, not as function) in MATLAB?

When parameters change in discrete ways, then those are discontinuties in the function, and the ode*() routines cannot deal with...

How do I solve a system of ODE with time-dependent parameters ( as discrete points, not as function) in MATLAB?

When parameters change in discrete ways, then those are discontinuties in the function, and the ode*() routines cannot deal with...

4 hours ago | 0

Answered

Transfer Function with Data in Table

arrayfun(@(k,d) tf(k,[d 1]), K, D) ... as a guess about what you intend. The same thing can be done in one tf() call: tf(num2...

Transfer Function with Data in Table

arrayfun(@(k,d) tf(k,[d 1]), K, D) ... as a guess about what you intend. The same thing can be done in one tf() call: tf(num2...

4 hours ago | 0

Answered

How can I begin overwriting a txt file from a specific line?

You can fopen the file with 'w+' permission. You cannot go directly to the the desired line. You can though fgetl or fgets to r...

How can I begin overwriting a txt file from a specific line?

You can fopen the file with 'w+' permission. You cannot go directly to the the desired line. You can though fgetl or fgets to r...

6 hours ago | 0

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Answered

R2015a compatibility with Mac OS Catalina (10.15)

R2015a is *not* compatible with Catalina.

R2015a compatibility with Mac OS Catalina (10.15)

R2015a is *not* compatible with Catalina.

6 hours ago | 0

Answered

Perform AND operations with multiple matrices

M = {rand(15), rand(15), rand(15)} ; c = rand(1, 3) ; cc = num2cell(c); fold(@and, cellfun(@(V,C) V == C, M, cc, 'uniform',...

Perform AND operations with multiple matrices

M = {rand(15), rand(15), rand(15)} ; c = rand(1, 3) ; cc = num2cell(c); fold(@and, cellfun(@(V,C) V == C, M, cc, 'uniform',...

13 hours ago | 0

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Answered

Using fprintf to write to multiple files simultaneously

You are correct, any one fprintf() can only write to one place at a time. You should have a look at diary

Using fprintf to write to multiple files simultaneously

You are correct, any one fprintf() can only write to one place at a time. You should have a look at diary

14 hours ago | 1

Answered

OFDM Trasnmitter and Receiver (Matlab Code)

https://www.mathworks.com/matlabcentral/answers/375213-how-can-replace-randi-instead-randint#answer_298378

OFDM Trasnmitter and Receiver (Matlab Code)

https://www.mathworks.com/matlabcentral/answers/375213-how-can-replace-randi-instead-randint#answer_298378

14 hours ago | 1

Answered

You have NaNs in your constraints! Thanks for any answers！

Your last set of constraints includes X(i)<= m*Y(i) where m=inf and Y is binvar(). binvar() have a value of either 0 or 1. W...

You have NaNs in your constraints! Thanks for any answers！

Your last set of constraints includes X(i)<= m*Y(i) where m=inf and Y is binvar(). binvar() have a value of either 0 or 1. W...

15 hours ago | 0

Answered

integration error in matlab

When the Symbolic Toolbox is not able to integrate a function, then it returns a placeholder int() expression showing where the ...

integration error in matlab

When the Symbolic Toolbox is not able to integrate a function, then it returns a placeholder int() expression showing where the ...

15 hours ago | 0

Answered

fzero of function 3 variables

fzero() is designed for single functions of one variables that return scalar values. fsolve() from the Optimization toolbox can...

fzero of function 3 variables

fzero() is designed for single functions of one variables that return scalar values. fsolve() from the Optimization toolbox can...

15 hours ago | 0

Answered

how to prevent printing output of Neural Network in command line

P = [1 2 3]; T = [2.0 4.1 5.9]; evalc('net = newrb(P,T)');

how to prevent printing output of Neural Network in command line

P = [1 2 3]; T = [2.0 4.1 5.9]; evalc('net = newrb(P,T)');

20 hours ago | 0

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Answered

Getting a warning when I fplot

fplot passes a vector of values into the function, so in C, T will be a vector of values. But you are using T as the upper bound...

Getting a warning when I fplot

fplot passes a vector of values into the function, so in C, T will be a vector of values. But you are using T as the upper bound...

23 hours ago | 0

Answered

imshow(uint8(imagematrix)) and imshow(int8(imagematrix)) gives different results although pixel values are between 0-255

>> uint8(255) ans = uint8 255 >> int8(uint8(255)) ans = int8 127 When you int8() data that is in the range 0...

imshow(uint8(imagematrix)) and imshow(int8(imagematrix)) gives different results although pixel values are between 0-255

>> uint8(255) ans = uint8 255 >> int8(uint8(255)) ans = int8 127 When you int8() data that is in the range 0...

24 hours ago | 1

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Answered

Is there a way to find a global minimum using genetic algorithm?

Genetic algorithms use the function handles they are given as "black boxes" (ga cannot examine how the function works.) In all a...

Is there a way to find a global minimum using genetic algorithm?

Genetic algorithms use the function handles they are given as "black boxes" (ga cannot examine how the function works.) In all a...

1 day ago | 1

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Answered

Ode45, evolution giving NaNs after some time, with no evidence of singularities in the equations

Your first order, e1, gets to be more than 1.0, and then the sqrt(1-x^2) gets to be complex. Problems accumulate from there. Wh...

Ode45, evolution giving NaNs after some time, with no evidence of singularities in the equations

Your first order, e1, gets to be more than 1.0, and then the sqrt(1-x^2) gets to be complex. Problems accumulate from there. Wh...

2 days ago | 1

| accepted

Answered

Automatically create variations of the same variable?

Do not use separate variables. use a cell array. You can have a table of range entries and loop through a list of check boxes, p...

Automatically create variations of the same variable?

Do not use separate variables. use a cell array. You can have a table of range entries and loop through a list of check boxes, p...

3 days ago | 1

| accepted

Answered

Skipping for loop with continue does not work

See http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

Skipping for loop with continue does not work

See http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

3 days ago | 1

Answered

for loops and if statements

if ys >= 100 ys is a vector. When you compare a vector to a value, the result is a logical vector of results. When you...

for loops and if statements

if ys >= 100 ys is a vector. When you compare a vector to a value, the result is a logical vector of results. When you...

3 days ago | 0

Answered

Increase CPU Speed - MAC

Is there any possibility to increase the number of cores you use by default? No, there is no such possibility. MATLAB's execut...

Increase CPU Speed - MAC

Is there any possibility to increase the number of cores you use by default? No, there is no such possibility. MATLAB's execut...

3 days ago | 0

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