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checking if field values in a single struct are identical
Depending on how the inputs look exactly, maybe: FieldC = struct2cell(S); Eq = true; for k = 2:numel(FieldC) if ~isequal...
checking if field values in a single struct are identical
Depending on how the inputs look exactly, maybe: FieldC = struct2cell(S); Eq = true; for k = 2:numel(FieldC) if ~isequal...
3年以上 前 | 0
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Trying to extract data trail by trail, but my data is sampled at different sampling rate.
If one signal is measured with 1000 Hz and another with 2000 Hz, it is trivial to determine timepoints of the first one in the t...
Trying to extract data trail by trail, but my data is sampled at different sampling rate.
If one signal is measured with 1000 Hz and another with 2000 Hz, it is trivial to determine timepoints of the first one in the t...
3年以上 前 | 0
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How not repeat the main loop, if other options are selected?
The description is not really clear. I assume, you want a list of menus to be selected one after the other. Then: status = 0; ...
How not repeat the main loop, if other options are selected?
The description is not really clear. I assume, you want a list of menus to be selected one after the other. Then: status = 0; ...
3年以上 前 | 0
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How can I generate the Radom number between two set of floating point number?
Gain0 = 0.0000250002787160545; Bias0 = -0.124315307973192; Gain = Gain0 + Gain0 * 0.18 * (rand(1, 160) - 0.5); Bias = Bias0...
How can I generate the Radom number between two set of floating point number?
Gain0 = 0.0000250002787160545; Bias0 = -0.124315307973192; Gain = Gain0 + Gain0 * 0.18 * (rand(1, 160) - 0.5); Bias = Bias0...
3年以上 前 | 0
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How do I properly convert a 64-bit binary string / Convert directly from bin or hex to uint64
The question explains with many details, where the numbers are coming from. It would be more useful to post a set aof available ...
How do I properly convert a 64-bit binary string / Convert directly from bin or hex to uint64
The question explains with many details, where the numbers are coming from. It would be more useful to post a set aof available ...
3年以上 前 | 0
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Fast computation of entries of large matrix
n = 2500; x1=rand(n, 5); % some matrix with high number of rows and small number of columns > 1 x2=rand(n, 5); % anoth...
Fast computation of entries of large matrix
n = 2500; x1=rand(n, 5); % some matrix with high number of rows and small number of columns > 1 x2=rand(n, 5); % anoth...
3年以上 前 | 0
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2nd order euler method problem
You have to convert the 2nd order equation to a system of order 1 at first. Accumulating dx2/dt2 is not meaingful. The 2nd deri...
2nd order euler method problem
You have to convert the 2nd order equation to a system of order 1 at first. Accumulating dx2/dt2 is not meaingful. The 2nd deri...
3年以上 前 | 0
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I tried dragging an image into the edit box for an answer on Matlab Central and doing so destroyed my answer.
Yes, I can confirm this behavior. For Firefox/Windows: When I drag an image into the field for editing (or anywhere else on th...
I tried dragging an image into the edit box for an answer on Matlab Central and doing so destroyed my answer.
Yes, I can confirm this behavior. For Firefox/Windows: When I drag an image into the field for editing (or anywhere else on th...
3年以上 前 | 0
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Renaming multiple files in a folder
Folder = 'C:\Your\Folder'; FileList = dir(fullfile(Folder), 'Antenna_REF_*.s2p'); for k = 1:numel(FileList) oldName = Fi...
Renaming multiple files in a folder
Folder = 'C:\Your\Folder'; FileList = dir(fullfile(Folder), 'Antenna_REF_*.s2p'); for k = 1:numel(FileList) oldName = Fi...
3年以上 前 | 1
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How to vectorize nested loops with conditional statements?
tributary = randn([81, 126]); cp_mesh = randn([81, 126, 49792]); tic cp_B1_2 = zeros(49792, 1); for i = 1:4979 % 49792 ...
How to vectorize nested loops with conditional statements?
tributary = randn([81, 126]); cp_mesh = randn([81, 126, 49792]); tic cp_B1_2 = zeros(49792, 1); for i = 1:4979 % 49792 ...
3年以上 前 | 0
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what does this error mean and how to fix it the image i imported was rgb and this error popped ,when its gray it works fine
imshow can handle RGB images as [M x N x 3] arrays and gray scale images as [M x N] matrices. The latter can be a logical matrix...
what does this error mean and how to fix it the image i imported was rgb and this error popped ,when its gray it works fine
imshow can handle RGB images as [M x N x 3] arrays and gray scale images as [M x N] matrices. The latter can be a logical matrix...
3年以上 前 | 0
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memoize => Save/Restore Cache
There is no documented way to store the cache. But it is cheap to create a look-up table for your function and store it manually...
memoize => Save/Restore Cache
There is no documented way to store the cache. But it is cheap to create a look-up table for your function and store it manually...
3年以上 前 | 1
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 1
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 1
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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年以上 前 | 1
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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年以上 前 | 0
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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年以上 前 | 0
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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年以上 前 | 0