Daniel Pollard
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Awarded to Daniel Pollard on 15 Feb 2022
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Awarded to Daniel Pollard on 02 May 2021
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回答済み
why do I receive "Index in position 1 is invalid. Array indices must be positive integers or logical values"
i and j in MATLAB both have the default value of the complex unit. When you say for i = 1:26 you override this, so now i take...
why do I receive "Index in position 1 is invalid. Array indices must be positive integers or logical values"
i and j in MATLAB both have the default value of the complex unit. When you say for i = 1:26 you override this, so now i take...
約3年 前 | 0
| 採用済み
回答済み
Why vector created by colon have improper values
I'm struggling a bit to understand exactly what your question is but I think what you're asking is why the value 0.8 is not in y...
Why vector created by colon have improper values
I'm struggling a bit to understand exactly what your question is but I think what you're asking is why the value 0.8 is not in y...
3年以上 前 | 1
回答済み
why when i use find command to find the index i face problem
I had a play with my version of Matlab and found the same result. I think what you've stumbled on is a floating point error. The...
why when i use find command to find the index i face problem
I had a play with my version of Matlab and found the same result. I think what you've stumbled on is a floating point error. The...
3年以上 前 | 0
回答済み
All possible combination based on 2^n but with 1 and -1
You could take the answer from your previous question, subtract 0.5 and multiply by 2. Your accepted answer was n = 3; m = dec...
All possible combination based on 2^n but with 1 and -1
You could take the answer from your previous question, subtract 0.5 and multiply by 2. Your accepted answer was n = 3; m = dec...
3年以上 前 | 0
回答済み
How do I delete the last dimension of a 256*256*3 matrix?
Is Ii your 256x256x3 array? An image of 256x256 pixels will have 256x256x3 elements because of the red, green and blue elements....
How do I delete the last dimension of a 256*256*3 matrix?
Is Ii your 256x256x3 array? An image of 256x256 pixels will have 256x256x3 elements because of the red, green and blue elements....
3年以上 前 | 0
| 採用済み
質問
Is there a way to vectorise this vector/matrix product?
I have a piece of code inside a for loop, which looks like for k = 1:size(G, 1) G(k) = real(W(:,k)' * R * W(:,k)) end G ...
3年以上 前 | 2 件の回答 | 0
2
回答回答済み
Calculate power of exponential
Deleted my previous answer as I hadn't seen your edit so gave a wrong answer. You need a . before the multiplication symbol. Tr...
Calculate power of exponential
Deleted my previous answer as I hadn't seen your edit so gave a wrong answer. You need a . before the multiplication symbol. Tr...
3年以上 前 | 1
| 採用済み
回答済み
I want my solution as a Vector
Does this work? X(z) = R/N; instead of X = R/N
I want my solution as a Vector
Does this work? X(z) = R/N; instead of X = R/N
3年以上 前 | 0
| 採用済み
回答済み
Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-1-by-2.
I haven't run it, but I think your code will error on the line deltaxj(i,ii,iii)=sum1+(x1-x1New)*(k.*(Rn+Rp)-dn)./dn; because...
Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-1-by-2.
I haven't run it, but I think your code will error on the line deltaxj(i,ii,iii)=sum1+(x1-x1New)*(k.*(Rn+Rp)-dn)./dn; because...
3年以上 前 | 0
| 採用済み
回答済み
How to error check a number for strings and blank inputs?
Are you looking for validateattributes or assert? For example, assert(menu == 1 || menu == 2) will throw an error if menu is n...
How to error check a number for strings and blank inputs?
Are you looking for validateattributes or assert? For example, assert(menu == 1 || menu == 2) will throw an error if menu is n...
3年以上 前 | 0
回答済み
FOR LOOP , beginner question.
Your code is d = []; for x=[0.1000,0.1500,0.2000] d=[d ((34.63/x)-5.126)/2.54]; disp ("ANSWER"); end x=[0.1000 0.1...
FOR LOOP , beginner question.
Your code is d = []; for x=[0.1000,0.1500,0.2000] d=[d ((34.63/x)-5.126)/2.54]; disp ("ANSWER"); end x=[0.1000 0.1...
3年以上 前 | 0
| 採用済み
回答済み
Can't calculate angle a, when 𝑠𝑖𝑛(𝑎)=2.
If a is a real number, then sin(a) must be between -1 and 1. Calling asin(2) returns 1.5708 - 1.3170i which is a complex num...
Can't calculate angle a, when 𝑠𝑖𝑛(𝑎)=2.
If a is a real number, then sin(a) must be between -1 and 1. Calling asin(2) returns 1.5708 - 1.3170i which is a complex num...
3年以上 前 | 2
| 採用済み
回答済み
Array indices must be positive integers or logical values
You wrote psi(i,j) = ((U0*V0)./W)*cos(W(t-YY(i,j)./V0))-V0*XX(i,j); Try psi(i,j) = ((U0*V0)./W)*cos(W*(t-YY(i,j)./V0))-V0*XX(...
Array indices must be positive integers or logical values
You wrote psi(i,j) = ((U0*V0)./W)*cos(W(t-YY(i,j)./V0))-V0*XX(i,j); Try psi(i,j) = ((U0*V0)./W)*cos(W*(t-YY(i,j)./V0))-V0*XX(...
3年以上 前 | 0
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解決済み
Find the largest number
Find the largest number |x| among 4 numbers given as variables |a|, |b|, |c|, and |d|. Example: Input: a = 4; b = 7; c ...
3年以上 前
回答済み
How to combine multiple curve fits in one plot?
https://www.mathworks.com/help/matlab/creating_plots/combine-multiple-plots.html This was literally the top result when I googl...
How to combine multiple curve fits in one plot?
https://www.mathworks.com/help/matlab/creating_plots/combine-multiple-plots.html This was literally the top result when I googl...
3年以上 前 | 0
回答済み
Why is validateattributes returning me a Not enough inputs error only in this context?
I was assigning the class to a vector in reverse order, using a loop like for k = 16:-1:1 lsqsin(k) = LsqSinusoid(N_sample...
Why is validateattributes returning me a Not enough inputs error only in this context?
I was assigning the class to a vector in reverse order, using a loop like for k = 16:-1:1 lsqsin(k) = LsqSinusoid(N_sample...
3年以上 前 | 0
| 採用済み
質問
Why is validateattributes returning me a Not enough inputs error only in this context?
I have a class definition called LsqSinusoid(n_samples, f, Fs). The constructor for that class takes three inputs - n_samples, t...
3年以上 前 | 1 件の回答 | 0
1
回答回答済み
While loop for testing the end of vector (Matlab)
If you know that it's 1-dimensional, you can use numel(vector) which returns the length of your vector. Also useful to know i...
While loop for testing the end of vector (Matlab)
If you know that it's 1-dimensional, you can use numel(vector) which returns the length of your vector. Also useful to know i...
4年弱 前 | 1
回答済み
Finding numChanges in array
Replace for i=1;length(V) with for ii = 1:length(V) The semicolon -> colon is a typo I suspect, and i has a built in value s...
Finding numChanges in array
Replace for i=1;length(V) with for ii = 1:length(V) The semicolon -> colon is a typo I suspect, and i has a built in value s...
4年弱 前 | 2
| 採用済み
回答済み
How to plot a graph in nm
Your method works perfectly well. An alternative option would be theta = 10 wavelength = [500:10:700] m = 1 d = (m.*waveleng...
How to plot a graph in nm
Your method works perfectly well. An alternative option would be theta = 10 wavelength = [500:10:700] m = 1 d = (m.*waveleng...
4年弱 前 | 1
| 採用済み
回答済み
Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 10-by-10. not sure why i am getting this error
Biot_top is size 10x10. dtMat(1,j) is size 1x1. This means the LHS of your line is 1x1, and the RHS is 10x10, so you can't make ...
Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 10-by-10. not sure why i am getting this error
Biot_top is size 10x10. dtMat(1,j) is size 1x1. This means the LHS of your line is 1x1, and the RHS is 10x10, so you can't make ...
4年弱 前 | 0
| 採用済み
回答済み
How to create one errorbar for multiple data points?
If I understand you right, could you do something like figure; hold on plot(x, y, 'bx') errorbar(mean(x), mean(y), std(y), 'k...
How to create one errorbar for multiple data points?
If I understand you right, could you do something like figure; hold on plot(x, y, 'bx') errorbar(mean(x), mean(y), std(y), 'k...
4年弱 前 | 1
| 採用済み
回答済み
Graph with similar axis value with the value given
You want xticks and yticks. As a note: you need the vectors to be in ascending order, and your second tickmark vector isn't. so...
Graph with similar axis value with the value given
You want xticks and yticks. As a note: you need the vectors to be in ascending order, and your second tickmark vector isn't. so...
4年弱 前 | 0
回答済み
Does MathWorks have software for rocket trajectory modeling at supersonic speed?
The Aerospace toolbox is likely to be the closest to what you want. I don't use it so don't know much about it, but it seems to ...
Does MathWorks have software for rocket trajectory modeling at supersonic speed?
The Aerospace toolbox is likely to be the closest to what you want. I don't use it so don't know much about it, but it seems to ...
4年弱 前 | 0
回答済み
converting degrees and radian
Something like option = input("Type A for degree to radians, and B for radians to degrees: ", 's') if option == "A" degs ...
converting degrees and radian
Something like option = input("Type A for degree to radians, and B for radians to degrees: ", 's') if option == "A" degs ...
4年弱 前 | 0
回答済み
How can I plot histogram?
Simply googling "matlab histogram" would have answered your question. That link is for the documentation for histogram. histog...
How can I plot histogram?
Simply googling "matlab histogram" would have answered your question. That link is for the documentation for histogram. histog...
4年弱 前 | 0
回答済み
Double for loop is not working properly
k will take the values [1 2]. For the first iteration of k, it stores data{1,1}(:,14) in ch{1,n}. The second time around, it wil...
Double for loop is not working properly
k will take the values [1 2]. For the first iteration of k, it stores data{1,1}(:,14) in ch{1,n}. The second time around, it wil...
4年弱 前 | 0
| 採用済み
回答済み
Uneven linspacing of an array
If I understand right, you have a vector len, and you want to have a vector x such that diff(x)=len. In that case, you can use t...
Uneven linspacing of an array
If I understand right, you have a vector len, and you want to have a vector x such that diff(x)=len. In that case, you can use t...
4年弱 前 | 0
回答済み
Problem with running a Matlab code.
Clear your variables by putting the command clear at the start of your programme. It's almost certainly holding onto variable...
Problem with running a Matlab code.
Clear your variables by putting the command clear at the start of your programme. It's almost certainly holding onto variable...
4年弱 前 | 0
| 採用済み
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