Answered

How to choose the middle of a random cell in a 2D grid

This solution is simpler. It creates the grid using lines instead of a mesh. % x axis smin = 0; L = 4; ns = 25; s = lin...

How to choose the middle of a random cell in a 2D grid

This solution is simpler. It creates the grid using lines instead of a mesh. % x axis smin = 0; L = 4; ns = 25; s = lin...

3 hours ago | 0

Answered

Read elements on one side of matrix diagonal into a 1D array

There might be a tighter solution, but I think this achieves what you are after: a = magic(4) b = a'; c = logical(triu(ones(4...

Read elements on one side of matrix diagonal into a 1D array

There might be a tighter solution, but I think this achieves what you are after: a = magic(4) b = a'; c = logical(triu(ones(4...

17 hours ago | 0

| accepted

Answered

How do you write a nested if statement that checks if the user has entered certain numbers?

This is an example of input validation. Here's one method that achieves what you are after. The prompt is repeated until the u...

How do you write a nested if statement that checks if the user has entered certain numbers?

This is an example of input validation. Here's one method that achieves what you are after. The prompt is repeated until the u...

20 hours ago | 1

| accepted

Answered

Creating index and replacing values

Below is a loop solution. There might be a way to vectorize this -- not sure. A = [0 0 1 0 1 0 0]; B = [ "030121", "030221", ...

Creating index and replacing values

Below is a loop solution. There might be a way to vectorize this -- not sure. A = [0 0 1 0 1 0 0]; B = [ "030121", "030221", ...

20 hours ago | 0

Answered

How to find multiple table column numbers by column names?

col_ind_rmt = find(string(G_Value.Properties.VariableNames) == "rk_mill_tonnage" | ... string(G_Value.Properties.VariableNa...

How to find multiple table column numbers by column names?

col_ind_rmt = find(string(G_Value.Properties.VariableNames) == "rk_mill_tonnage" | ... string(G_Value.Properties.VariableNa...

22 hours ago | 0

Answered

How to choose the middle of a random cell in a 2D grid

OK, thanks for the clarification. I think this achieves what you are after. The added code randomly chooses vertices (points) ...

How to choose the middle of a random cell in a 2D grid

OK, thanks for the clarification. I think this achieves what you are after. The added code randomly chooses vertices (points) ...

1 day ago | 0

| accepted

Answered

Customed distance function Haversine

You need to re-work your haversine function, as per the requirements for distance functions used with pdist2. There needs to be...

Customed distance function Haversine

You need to re-work your haversine function, as per the requirements for distance functions used with pdist2. There needs to be...

1 day ago | 0

Answered

Verifying an Vector composition

There is probably an easier approach, but I think this works. The result of this expression is 1 if a1<a2<a3<a4<a5, or 0 otherw...

Verifying an Vector composition

There is probably an easier approach, but I think this works. The result of this expression is 1 if a1<a2<a3<a4<a5, or 0 otherw...

2 days ago | 1

Answered

how can I sweep a triangle area using two loops

No need for loops. The tests are built in to the inpolygon function when you provide matrices as input. Assuming you want to f...

how can I sweep a triangle area using two loops

No need for loops. The tests are built in to the inpolygon function when you provide matrices as input. Assuming you want to f...

2 days ago | 0

Answered

HOW TO FILTER AN HOUR DATA FROM ARRAY OF DAILY,MONTHLY AND YEAR DATA

T = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/658625/SAMPLE%20DATA.xlsx'); % combine DATE and...

HOW TO FILTER AN HOUR DATA FROM ARRAY OF DAILY,MONTHLY AND YEAR DATA

T = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/658625/SAMPLE%20DATA.xlsx'); % combine DATE and...

3 days ago | 0

Answered

How to duplicate cell array by rows?

n = handles.times; % your integer value newSequence = repmat(sequence, 1, n);

How to duplicate cell array by rows?

n = handles.times; % your integer value newSequence = repmat(sequence, 1, n);

3 days ago | 0

| accepted

Answered

integral of a matrix

You note: I want to take the integral of an exponetial of a matrix But, exp(-M.*t)*Dmat; is a vector, not a matrix. Tr...

integral of a matrix

You note: I want to take the integral of an exponetial of a matrix But, exp(-M.*t)*Dmat; is a vector, not a matrix. Tr...

3 days ago | 0

Answered

Help rewritting textfiles in a certain way

This can probably be streamlined, but I think it achieves what you are looking for: % read the test data into a 1x1 cell and co...

Help rewritting textfiles in a certain way

This can probably be streamlined, but I think it achieves what you are looking for: % read the test data into a 1x1 cell and co...

4 days ago | 1

| accepted

Answered

How to get row and column from a vector size

Assuming the vector length being a prime number (as noted by @the cyclist) is just one possible case of many, then the following...

How to get row and column from a vector size

Assuming the vector length being a prime number (as noted by @the cyclist) is just one possible case of many, then the following...

4 days ago | 0

| accepted

Answered

How to plot based on the shortest vector?

So, the approach I think you are willing to take is just to ignore the few extra elements that are in the longer of the two vect...

How to plot based on the shortest vector?

So, the approach I think you are willing to take is just to ignore the few extra elements that are in the longer of the two vect...

4 days ago | 1

Answered

Best equation for Curve Fitting

How about r = .9999? Linear model Poly9: f(x) = p1*x^9 + p2*x^8 + p3*x^7 + p4*x^6 + p5*x^5 + p6*x^4...

Best equation for Curve Fitting

How about r = .9999? Linear model Poly9: f(x) = p1*x^9 + p2*x^8 + p3*x^7 + p4*x^6 + p5*x^5 + p6*x^4...

4 days ago | 0

Answered

How can a 4 element array index pull stored string values?

I think this is more or less what you are after. The output is generated both as a cell array and as a string vector. % create...

How can a 4 element array index pull stored string values?

I think this is more or less what you are after. The output is generated both as a cell array and as a string vector. % create...

4 days ago | 1

| accepted

Answered

Using System.DateTime in a Timetable

This converts the System.DateTime variable returned by netTime to a datetime variable, which can then be used with timetable: t...

Using System.DateTime in a Timetable

This converts the System.DateTime variable returned by netTime to a datetime variable, which can then be used with timetable: t...

4 days ago | 0

| accepted

Answered

Change color of x axis and y axis barplot

I think this achieves what you are after. Note that plotyy is "not recommended". a = [rand(3,1)*100, zeros(3,1)]; b = [zeros(...

Change color of x axis and y axis barplot

I think this achieves what you are after. Note that plotyy is "not recommended". a = [rand(3,1)*100, zeros(3,1)]; b = [zeros(...

5 days ago | 0

| accepted

Answered

Scatter Plot Legend Issue With Assignment

You only need to call the scatter function once. Re-organize your data, combining the values into a matrix. Then, you'll get ...

Scatter Plot Legend Issue With Assignment

You only need to call the scatter function once. Re-organize your data, combining the values into a matrix. Then, you'll get ...

5 days ago | 1

Answered

Do error bars affect confidence intervals?

You note: when I use the errorbar function in the code of the fit, it doesn't seem to change the confidence intervals The ...

Do error bars affect confidence intervals?

You note: when I use the errorbar function in the code of the fit, it doesn't seem to change the confidence intervals The ...

5 days ago | 0

Answered

Help with plotting data in a mat file

I think the error might be in how you are verifying your script. I ran your script and generated the plots. Here is what I see ...

Help with plotting data in a mat file

I think the error might be in how you are verifying your script. I ran your script and generated the plots. Here is what I see ...

5 days ago | 0

| accepted

Answered

Changing prime numbers in a matrix

M = randi([1 50],100); M(isprime(M)) = 1415;

Changing prime numbers in a matrix

M = randi([1 50],100); M(isprime(M)) = 1415;

6 days ago | 0

Answered

How to extract value from matrix in a cell array?

>> cell{1}(1,3) ans = 5

How to extract value from matrix in a cell array?

>> cell{1}(1,3) ans = 5

6 days ago | 0

| accepted

Answered

Using a for loop to print function values

Seems you are confusing Vs with V. And what is VL-0.6 in your question? Try this... (outputs a vector of values) V = rand(1,1...

Using a for loop to print function values

Seems you are confusing Vs with V. And what is VL-0.6 in your question? Try this... (outputs a vector of values) V = rand(1,1...

7 days ago | 0

| accepted

Answered

How to find area under graph between two points ?

Assuming you want the area under the curve between two values of x (your "specific points"), here's what I put together using so...

How to find area under graph between two points ?

Assuming you want the area under the curve between two values of x (your "specific points"), here's what I put together using so...

7 days ago | 0

Answered

How to extract data from an array?

t(700:1900) P(700:1900) Really, this is pretty basic stuff. I suggest you review Accessing Array Elements.

How to extract data from an array?

t(700:1900) P(700:1900) Really, this is pretty basic stuff. I suggest you review Accessing Array Elements.

7 days ago | 0

| accepted

Answered

Why is logical array fasle?

The result is false because k1 DOES NOT EQUAL g Note that both k1 and g are scalars, not vectors. Therefore, the result of k1=...

Why is logical array fasle?

The result is false because k1 DOES NOT EQUAL g Note that both k1 and g are scalars, not vectors. Therefore, the result of k1=...

7 days ago | 0

Answered

How to remove space between grouped bars in a bar graph?

Here's an approach that might be useful. What if you ungroup the data first? There will be no space between the groups, because...

How to remove space between grouped bars in a bar graph?

Here's an approach that might be useful. What if you ungroup the data first? There will be no space between the groups, because...

7 days ago | 0

Answered

saving files in a loop with different names

for k=1:20 ... filename = sprintf('info%d.dat', k); writematrix(M, filename); % data in M ... end

saving files in a loop with different names

for k=1:20 ... filename = sprintf('info%d.dat', k); writematrix(M, filename); % data in M ... end

7 days ago | 0