Answered

Matlab Simulink RepMat Execution Time

persistent idx11 if isempty(idx11) idx11 = ones(1,11); end y = u(:, idx11) ;

Matlab Simulink RepMat Execution Time

persistent idx11 if isempty(idx11) idx11 = ones(1,11); end y = u(:, idx11) ;

1 hour ago | 0

Answered

Unable to filter data with a for loop and replace command

replace() is a text processing function. You cannot use it to delete numeric values. AAA = AA(AA ~= 0); or in this particular ...

Unable to filter data with a for loop and replace command

replace() is a text processing function. You cannot use it to delete numeric values. AAA = AA(AA ~= 0); or in this particular ...

3 hours ago | 0

| accepted

Answered

possible to use the terminal command in matlab script?

You can use I/O redirection. However, if you need two-way interaction then you need a pipe. There is a popen() in the File Exch...

possible to use the terminal command in matlab script?

You can use I/O redirection. However, if you need two-way interaction then you need a pipe. There is a popen() in the File Exch...

3 hours ago | 0

Answered

Why do i get decimal on my final answer?

Give the command format long g and now ask to display the answers again.

Why do i get decimal on my final answer?

Give the command format long g and now ask to display the answers again.

3 hours ago | 1

Answered

Decimal places for value stored

how can i make the value of f(x), f(x+h) and f(x-h) to be only up to 4 decimal places when calculating for f2_prime? You would ...

Decimal places for value stored

how can i make the value of f(x), f(x+h) and f(x-h) to be only up to 4 decimal places when calculating for f2_prime? You would ...

5 hours ago | 0

Answered

Using the function command to open a .txt file

function total_mail=AllMail(filename) q = dlmread(filename) and somewhere you would need to invoke the function with a file na...

Using the function command to open a .txt file

function total_mail=AllMail(filename) q = dlmread(filename) and somewhere you would need to invoke the function with a file na...

7 hours ago | 0

| accepted

Answered

when i try to run mean function

No, that error literally cannot happen with the code you posted. In your previous question, you posted an error that can only o...

when i try to run mean function

No, that error literally cannot happen with the code you posted. In your previous question, you posted an error that can only o...

7 hours ago | 0

Answered

when i tried run something from excel it shows error?

Ftrain = Data(1:990, :); Ftest = Data(991:1000, :); Note that this will return the same datatype that Data is -- if Data is a ...

when i tried run something from excel it shows error?

Ftrain = Data(1:990, :); Ftest = Data(991:1000, :); Note that this will return the same datatype that Data is -- if Data is a ...

7 hours ago | 1

Answered

Timestamp to Decimal day of year

d = datetime('2003-02-20 01:00:00.100') floor(days(d - dateshift(d, 'start', 'year'))) + 1 The +1 is because the start of year...

Timestamp to Decimal day of year

d = datetime('2003-02-20 01:00:00.100') floor(days(d - dateshift(d, 'start', 'year'))) + 1 The +1 is because the start of year...

8 hours ago | 0

Answered

ploting in matlab R2017b

That outcome is correct given that integral -- if you expected a different output then what you integrate is not correct. int(d...

ploting in matlab R2017b

That outcome is correct given that integral -- if you expected a different output then what you integrate is not correct. int(d...

8 hours ago | 0

Answered

gray scale image is not showed without divide by 255

dimg5= double (img5) That converts datatype but leaves the range alone. You are working with the floating point range 0 to 255....

gray scale image is not showed without divide by 255

dimg5= double (img5) That converts datatype but leaves the range alone. You are working with the floating point range 0 to 255....

9 hours ago | 0

Answered

Finding the ranges where scatteredInterpolant is above threshold

scatteredInterpolant uses linear interpolation by default. The maximum possible value when you interpolate in the interior, is e...

Finding the ranges where scatteredInterpolant is above threshold

scatteredInterpolant uses linear interpolation by default. The maximum possible value when you interpolate in the interior, is e...

9 hours ago | 0

Answered

Why doesn't Matlab finish the computation ?

MATLAB did complete the calculation. That was the result. It might be more clear if you use syms d3 theta1 theta2 theta4 thet...

Why doesn't Matlab finish the computation ?

MATLAB did complete the calculation. That was the result. It might be more clear if you use syms d3 theta1 theta2 theta4 thet...

9 hours ago | 0

Answered

Fitlm results not obtainable

https://www.mathworks.com/help/stats/fitlm.html#bt0ck7o_sep_shared-y The response variable must be a vector . Not a matrix. If...

Fitlm results not obtainable

https://www.mathworks.com/help/stats/fitlm.html#bt0ck7o_sep_shared-y The response variable must be a vector . Not a matrix. If...

10 hours ago | 0

Answered

How can I solve this integration Numerically?

k = rand() * 10 z = rand() * 10 gamma0 = randn() GAMMAINC = @(z, nu) 1 - igamma(nu,z) / gamma(nu); Pi = sym(pi); syms h_a ...

How can I solve this integration Numerically?

k = rand() * 10 z = rand() * 10 gamma0 = randn() GAMMAINC = @(z, nu) 1 - igamma(nu,z) / gamma(nu); Pi = sym(pi); syms h_a ...

10 hours ago | 0

Answered

Assign numerical values to superscripts and subscripts in symbolic equations

A = sym('sigma_dot_%d_%d__%d__%d', [maxm, maxn, maxF, maxFp] ); Note that subscripts of 0 would have to be handled differen...

Assign numerical values to superscripts and subscripts in symbolic equations

A = sym('sigma_dot_%d_%d__%d__%d', [maxm, maxn, maxF, maxFp] ); Note that subscripts of 0 would have to be handled differen...

13 hours ago | 0

Answered

Error in computing IRF (VAR model)

https://github.com/Vermandel/VAR-toolbox/blob/master/fn_compute_IRF.m The code uses eval() which is not a good idea. Your ...

Error in computing IRF (VAR model)

https://github.com/Vermandel/VAR-toolbox/blob/master/fn_compute_IRF.m The code uses eval() which is not a good idea. Your ...

14 hours ago | 0

Answered

How to take the engineering FFT (magnitude spectrum scaled correctly) of Signal in Matlab?

The unit for the y axis of the discrete fft is the original unit *per hertz*. You need to integrate it over frequency to get the...

How to take the engineering FFT (magnitude spectrum scaled correctly) of Signal in Matlab?

The unit for the y axis of the discrete fft is the original unit *per hertz*. You need to integrate it over frequency to get the...

23 hours ago | 0

Answered

Variable ... is undefined on some execution paths

persistent T1_prev if isempty(T1_prev); T1_prev = 0; end

Variable ... is undefined on some execution paths

persistent T1_prev if isempty(T1_prev); T1_prev = 0; end

23 hours ago | 0

| accepted

Answered

The way to make an array using function_hundle(関数ハンドルを用いた配列の作り方)

N = 5; f = cell(N,1); for i = 1 : N f{i} = @(x) i.*x; end You cannot use () indexing to store different function handle...

The way to make an array using function_hundle(関数ハンドルを用いた配列の作り方)

N = 5; f = cell(N,1); for i = 1 : N f{i} = @(x) i.*x; end You cannot use () indexing to store different function handle...

1 day ago | 0

Answered

Solving nonlinear equation using lsqnonlin

When I use those values in my objective function I get good results. However, when I am trying to findout the values of those un...

Solving nonlinear equation using lsqnonlin

When I use those values in my objective function I get good results. However, when I am trying to findout the values of those un...

1 day ago | 0

Answered

Intersection of two vector of string/char type

[a, b, c] = intersect(["a1", "a2"], ["b1", "a1"])

Intersection of two vector of string/char type

[a, b, c] = intersect(["a1", "a2"], ["b1", "a1"])

1 day ago | 0

| accepted

Answered

Error using optimset(@lsqnonlin) matlab 2020b

Wrong options routine for that function. You need https://www.mathworks.com/help/optim/ug/optim.problemdef.optimizationproblem.o...

Error using optimset(@lsqnonlin) matlab 2020b

Wrong options routine for that function. You need https://www.mathworks.com/help/optim/ug/optim.problemdef.optimizationproblem.o...

1 day ago | 1

| accepted

Answered

Meaning of "#X" in output of dsolve

I have not seen that output from dsolve() before, but I confirm that it exists. If you focus in, you will see that you have sub...

Meaning of "#X" in output of dsolve

I have not seen that output from dsolve() before, but I confirm that it exists. If you focus in, you will see that you have sub...

1 day ago | 0

Answered

Solve equation in interval

syms x solve([diff(x^2*exp(-x)), x <= 1, x >= -1])

Solve equation in interval

syms x solve([diff(x^2*exp(-x)), x <= 1, x >= -1])

1 day ago | 0

Answered

Storing data in matlab matrix using loop

[K1, K2, K3] = ndgrid(2:1:20, 2:1:20, 2:1:20); M = K1 + K2 + K3; mask = M == 20; A = [K1(mask), K2(mask), K3(mask)]; size(A)...

Storing data in matlab matrix using loop

[K1, K2, K3] = ndgrid(2:1:20, 2:1:20, 2:1:20); M = K1 + K2 + K3; mask = M == 20; A = [K1(mask), K2(mask), K3(mask)]; size(A)...

1 day ago | 0

Answered

Not enough input arguments

You have not shown us the definition of f, g, or j, so we cannot say which of them needs more than the four input arguments you ...

Not enough input arguments

You have not shown us the definition of f, g, or j, so we cannot say which of them needs more than the four input arguments you ...

1 day ago | 0

Answered

Could someone explain what the code means?

1/1^4 + 1/2^4 + 1/3^4 + 1/4^4 + 1/5^4 + 1/6^4 and keep going adding values until the number stops changing (which will happen be...

Could someone explain what the code means?

1/1^4 + 1/2^4 + 1/3^4 + 1/4^4 + 1/5^4 + 1/6^4 and keep going adding values until the number stops changing (which will happen be...

1 day ago | 0

| accepted

Answered

How to replace all newline characters in a string with a space?

strfind(strtxt, 10) will return the indices. Hint: S = "hello" S{1}(1) = 'j'

How to replace all newline characters in a string with a space?

strfind(strtxt, 10) will return the indices. Hint: S = "hello" S{1}(1) = 'j'

1 day ago | 0

Answered

MATLAB DOES NOT CALCULATE THE ABSOLUTE VALUE

To get anywhere useful in a few lines, we have to make the unjustified assumption that the variable i corresponds to sqrt(-1) ...

MATLAB DOES NOT CALCULATE THE ABSOLUTE VALUE

To get anywhere useful in a few lines, we have to make the unjustified assumption that the variable i corresponds to sqrt(-1) ...

1 day ago | 0