Answered
Select only the matrices within the cell
C = {rand(2), [], rand(3), [], [], rand(4)}; newC = C(~cellfun('isempty', C))
Select only the matrices within the cell
C = {rand(2), [], rand(3), [], [], rand(4)}; newC = C(~cellfun('isempty', C))
3 years ago | 0
Answered
how to create a struct that would have number of fields that corresponds to the number of iterations inside a loop and also automatically save this data
Result = struct(); for day = 1:7 % No loop needed: MPE1 = signal(:, :, day) - signal(:, :, day) - kE1 * (signal(:, ...
how to create a struct that would have number of fields that corresponds to the number of iterations inside a loop and also automatically save this data
Result = struct(); for day = 1:7 % No loop needed: MPE1 = signal(:, :, day) - signal(:, :, day) - kE1 * (signal(:, ...
3 years ago | 0
| accepted
Answered
How to create all possible matrices of zeros and ones without having more than one '1' in the same column?
n = 3; m = 4; c = n^m; X = cell(1, c); % List of outputs v = n .^ (1-m:0); % Calculate expensive power operation once f...
How to create all possible matrices of zeros and ones without having more than one '1' in the same column?
n = 3; m = 4; c = n^m; X = cell(1, c); % List of outputs v = n .^ (1-m:0); % Calculate expensive power operation once f...
3 years ago | 0
Answered
Error using plot vectors must be the same length
The error message is clear. Use the debugger to examine the reasons: dbstop if error Type this in the command window an run th...
Error using plot vectors must be the same length
The error message is clear. Use the debugger to examine the reasons: dbstop if error Type this in the command window an run th...
3 years ago | 0
Answered
MATLAB and several command prompt commands
Try this under Windows: for i = 0:7 command = sprintf('tftp -i 192.168.178.100 get dmafiles-%d && exit &', i); % ...
MATLAB and several command prompt commands
Try this under Windows: for i = 0:7 command = sprintf('tftp -i 192.168.178.100 get dmafiles-%d && exit &', i); % ...
3 years ago | 0
Answered
complicated vectorization of for loop wich icludes if and referes back to last loop iteration results
Why do you assume, that a vectorization is faster? Neither loops nor IF-conditions are slow in modern Matlab versions. Your cod...
complicated vectorization of for loop wich icludes if and referes back to last loop iteration results
Why do you assume, that a vectorization is faster? Neither loops nor IF-conditions are slow in modern Matlab versions. Your cod...
3 years ago | 0
Answered
I am facing an error "invalid file identifier" while using fprintf and fopen
Whenever you try to open a file, check the success: [file_1, msg] = fopen(outputFileName, 'w'); assert(file_1 > 0, msg); Now ...
I am facing an error "invalid file identifier" while using fprintf and fopen
Whenever you try to open a file, check the success: [file_1, msg] = fopen(outputFileName, 'w'); assert(file_1 > 0, msg); Now ...
3 years ago | 1
Answered
how to solv this issue?
Replace y=eval(fx); by y = fx(x) and switch grd case 'on' grid on; case 'off' grid off; end by the easier: gr...
how to solv this issue?
Replace y=eval(fx); by y = fx(x) and switch grd case 'on' grid on; case 'off' grid off; end by the easier: gr...
3 years ago | 0
Answered
how come with same formula, i get two different results in Matlab
See Torsten's comment for the limited precision, if you use 4 decimal places only. In addition, multiplying with the inverse is...
how come with same formula, i get two different results in Matlab
See Torsten's comment for the limited precision, if you use 4 decimal places only. In addition, multiplying with the inverse is...
3 years ago | 0
Answered
how to write a code for two input -one output function (f=@(v,r)) using bisection method?
pi = 3.14; % Brrrr G = 6.67e-11; M = 2e30; c = 1e4; rho = 1e-21; n = 2.5; gamma = 1 + 1/n; dotm = pi*G^2*M^2*(rho/c^3) * (2...
how to write a code for two input -one output function (f=@(v,r)) using bisection method?
pi = 3.14; % Brrrr G = 6.67e-11; M = 2e30; c = 1e4; rho = 1e-21; n = 2.5; gamma = 1 + 1/n; dotm = pi*G^2*M^2*(rho/c^3) * (2...
3 years ago | 0
Answered
I HAVE THE FOLLOWING ERROR: "Error using bvparguments" HELP ME TO FIX IT
The code does not run. linspace(0,infinity,40) - what is "infinity" and of course you cannot divide the interval [0, Infinity] ...
I HAVE THE FOLLOWING ERROR: "Error using bvparguments" HELP ME TO FIX IT
The code does not run. linspace(0,infinity,40) - what is "infinity" and of course you cannot divide the interval [0, Infinity] ...
3 years ago | 0
| accepted
Answered
Can you help solving this differential equation using ode15i, please?
dx_dz = ??? x_p = ??? V = ??? Z = ??? h = ??? tspan = [0, 10]; % ??? x0 = rand(1, 5); % ??? [Z, Y] = ode15s(@(z, x) MS_A...
Can you help solving this differential equation using ode15i, please?
dx_dz = ??? x_p = ??? V = ??? Z = ??? h = ??? tspan = [0, 10]; % ??? x0 = rand(1, 5); % ??? [Z, Y] = ode15s(@(z, x) MS_A...
3 years ago | 0
Answered
index exceeds the number of array elements. Index must not exceed 1.
Omit the confusing j = 0; It does not have any effect, because the for j command overwrites the value immediately. If Z and/o...
index exceeds the number of array elements. Index must not exceed 1.
Omit the confusing j = 0; It does not have any effect, because the for j command overwrites the value immediately. If Z and/o...
3 years ago | 1
| accepted
Answered
How to solve 1.0000 not equal to 1 in MATLAB?
Welcome to the world of numerical maths. Remember, that the summation is numerically instable. Even a reordering of the element...
How to solve 1.0000 not equal to 1 in MATLAB?
Welcome to the world of numerical maths. Remember, that the summation is numerically instable. Even a reordering of the element...
3 years ago | 1
Answered
Returning Multiple Variables from a function to be added to existing variable.
What about: [k_1,K_1,B1,b1,c1]=element_stiffness([2,4,1],Coords, v,E,t,D) k = [k, k_1]; % Or: k = k + k_1; % Or: k = z...
Returning Multiple Variables from a function to be added to existing variable.
What about: [k_1,K_1,B1,b1,c1]=element_stiffness([2,4,1],Coords, v,E,t,D) k = [k, k_1]; % Or: k = k + k_1; % Or: k = z...
3 years ago | 0
Answered
How to find max values in vector for each 10 rows
With the bold guess, that you mean rand(100, 1) instead of rand(1:100): data = rand(100, 1); result = max(reshape(data, 10, ...
How to find max values in vector for each 10 rows
With the bold guess, that you mean rand(100, 1) instead of rand(1:100): data = rand(100, 1); result = max(reshape(data, 10, ...
3 years ago | 0
| accepted
Answered
How do you solve for a Double summation with loops
If yvect and zvect are both [1 x 101] vectors, this line must fail: uvect = uvect + coef * (cos(ai * yvect) * cos(aj * zvect));...
How do you solve for a Double summation with loops
If yvect and zvect are both [1 x 101] vectors, this line must fail: uvect = uvect + coef * (cos(ai * yvect) * cos(aj * zvect));...
3 years ago | 0
Answered
Get the "File version" of an exe file
Create a VBS script: ' File: FileProductVer.vbs Set FSO=CreateObject("Scripting.FileSystemObject") If Wscript.Arguments.Count...
Get the "File version" of an exe file
Create a VBS script: ' File: FileProductVer.vbs Set FSO=CreateObject("Scripting.FileSystemObject") If Wscript.Arguments.Count...
3 years ago | 1
| accepted
Answered
for loops out of bounds
for loop i=0:0.5:pi; This is no valid Matlab syntax. You can run code directly in the forum's interface and you will get an er...
for loops out of bounds
for loop i=0:0.5:pi; This is no valid Matlab syntax. You can run code directly in the forum's interface and you will get an er...
3 years ago | 0
| accepted
Answered
How to convert Universal time to Local time?
The command tzoffset accepts one input only: [dt,dst] = tzoffset(t) Therefore the additional arguments 'EST','5' are not valid...
How to convert Universal time to Local time?
The command tzoffset accepts one input only: [dt,dst] = tzoffset(t) Therefore the additional arguments 'EST','5' are not valid...
3 years ago | 0
| accepted
Answered
Why do I get this error before executing any code in matlab?
Did you search in the forum before asking? If not: https://www.mathworks.com/matlabcentral/answers/520399-why-do-i-receive-erro...
Why do I get this error before executing any code in matlab?
Did you search in the forum before asking? If not: https://www.mathworks.com/matlabcentral/answers/520399-why-do-i-receive-erro...
3 years ago | 0
| accepted
Answered
how not to delete one figure using clf?
clf clears the contents of the current figure. If you do not want this, remove clf. Maybe all you want is to clear the current...
how not to delete one figure using clf?
clf clears the contents of the current figure. If you do not want this, remove clf. Maybe all you want is to clear the current...
3 years ago | 0
Answered
How to insert a new line before a character in file?
What is the wanted output? A cell string? A string? Another file? % Perhaps: str = fileread('yourFile.txt'); str = '$text-text...
How to insert a new line before a character in file?
What is the wanted output? A cell string? A string? Another file? % Perhaps: str = fileread('yourFile.txt'); str = '$text-text...
3 years ago | 1
Answered
remove brace indexing from 1x1 matrix
The quotes are not part of the contents, but shown in the command window only to show, that this is a CHAR vector. Therefore the...
remove brace indexing from 1x1 matrix
The quotes are not part of the contents, but shown in the command window only to show, that this is a CHAR vector. Therefore the...
3 years ago | 1
Answered
sprintf loop for writing equations
F{i} = sprintf(formatSpec,Dtau(i),l(i),s,alpha_1(i),alpha_1(i)); %^ ^ Curly braces for a cell string
sprintf loop for writing equations
F{i} = sprintf(formatSpec,Dtau(i),l(i),s,alpha_1(i),alpha_1(i)); %^ ^ Curly braces for a cell string
3 years ago | 0
Answered
Fastest selection of a coordinate in 3d array that fulfills a condition?
If the condition is not rare in the array, a gun-shot method can be very fast: T = randi(10, 500,500,200); tic doSearch = tru...
Fastest selection of a coordinate in 3d array that fulfills a condition?
If the condition is not rare in the array, a gun-shot method can be very fast: T = randi(10, 500,500,200); tic doSearch = tru...
3 years ago | 0
| accepted
Answered
Undefined function or variable in a POD matlab code
A strange detail: function VelocityDistributionPOD (SnapshotsAddress) SnapshotsAddress = pwd; The folder name provided as inp...
Undefined function or variable in a POD matlab code
A strange detail: function VelocityDistributionPOD (SnapshotsAddress) SnapshotsAddress = pwd; The folder name provided as inp...
3 years ago | 0
| accepted
Answered
Script works on Windows OS but not on MacOS
Use the debugger to identify the problem. Type this in the command window: dbstop if error Then run the code again. If Matlab ...
Script works on Windows OS but not on MacOS
Use the debugger to identify the problem. Type this in the command window: dbstop if error Then run the code again. If Matlab ...
3 years ago | 0
Answered
Plotting Sum of series: whats wrong with this code?
"k from 0 to 100" does not match "k = 1:inf;". In the equation, the sum starts at 1, not as 0. I do not see a reason to solve th...
Plotting Sum of series: whats wrong with this code?
"k from 0 to 100" does not match "k = 1:inf;". In the equation, the sum starts at 1, not as 0. I do not see a reason to solve th...
3 years ago | 1
| accepted