Answered

How to update array inside a database

I don't fully know the answer, but here are a couple thoughts. I highly doubt you need to explore JDBC. If ODBC works for fetch...

How to update array inside a database

I don't fully know the answer, but here are a couple thoughts. I highly doubt you need to explore JDBC. If ODBC works for fetch...

20 jours ago | 0

Answered

Cost matrix from an array without for loop.

You can use implicit expansion to subtract the two vector from each other, by transposing one of them. cost = abs(domain-domain...

Cost matrix from an array without for loop.

You can use implicit expansion to subtract the two vector from each other, by transposing one of them. cost = abs(domain-domain...

20 jours ago | 1

| accepted

Answered

Is there a way to avoid this inaccuracy when converting an string to a double and then to an unsigned int? I have tried using str2num() but get the same result.Thanks!

The reason for this is that MATLAB uses double-precision arithmetic by default, which will typically give approximately 15 decim...

Is there a way to avoid this inaccuracy when converting an string to a double and then to an unsigned int? I have tried using str2num() but get the same result.Thanks!

The reason for this is that MATLAB uses double-precision arithmetic by default, which will typically give approximately 15 decim...

21 jours ago | 0

Answered

Extract data from matrices and arrays using vectors of coordinates

Use the sub2ind function to convert the subscripts to a linear index into the matrix. Using your example: A = [1 2 3; 3 4 5; 8...

Extract data from matrices and arrays using vectors of coordinates

Use the sub2ind function to convert the subscripts to a linear index into the matrix. Using your example: A = [1 2 3; 3 4 5; 8...

22 jours ago | 1

| accepted

Answered

For loop for correlation - linear indexing

I think you need to use A{:,i} instead of A(:,i) in the call to corrcoef.

For loop for correlation - linear indexing

I think you need to use A{:,i} instead of A(:,i) in the call to corrcoef.

22 jours ago | 1

| accepted

Answered

Why LDA model generate a topic include stop words although these words don't exist in the data ?

I don't think it is possible to answer this question well without seeing the data. I think it is extraordinarily unlikely that ...

Why LDA model generate a topic include stop words although these words don't exist in the data ?

I don't think it is possible to answer this question well without seeing the data. I think it is extraordinarily unlikely that ...

22 jours ago | 0

Answered

How to do a gauss partial pivot?

A = [1 2 3; 2 -1 1; 1 1 1] A./abs(max(A,[],2))

How to do a gauss partial pivot?

A = [1 2 3; 2 -1 1; 1 1 1] A./abs(max(A,[],2))

22 jours ago | 0

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Answered

Question about sorting an array column by column

choose_data = sort(choose_data) will sort every column independently. Ascending sorting is the default, so you don't need to sp...

Question about sorting an array column by column

choose_data = sort(choose_data) will sort every column independently. Ascending sorting is the default, so you don't need to sp...

22 jours ago | 0

Answered

Please explain how does this file work?

Because it does look like MATLAB code, it looks like you could add a .m extension to the file, and run it normally. I'm not sur...

Please explain how does this file work?

Because it does look like MATLAB code, it looks like you could add a .m extension to the file, and run it normally. I'm not sur...

22 jours ago | 0

| accepted

Answered

What " *.form='full' " means in making structure??

This is a GAMS question, not a MATLAB question. It looks like this page from the GAMS documentation discussing the form field. ...

What " *.form='full' " means in making structure??

This is a GAMS question, not a MATLAB question. It looks like this page from the GAMS documentation discussing the form field. ...

23 jours ago | 0

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Answered

Error in line for CVX

I don't know CVX, but the error message seems straightforward. My best guess is that m is a variable of type cvx, and you are tr...

Error in line for CVX

I don't know CVX, but the error message seems straightforward. My best guess is that m is a variable of type cvx, and you are tr...

23 jours ago | 0

Answered

How to change variable value for every iteration in a for loop?

for na = 1:length(a) for n=1:length(x) %Coefficient of Lift at each panel l(n) = f(n).*(a(na))-((z(n)).*(...

How to change variable value for every iteration in a for loop?

for na = 1:length(a) for n=1:length(x) %Coefficient of Lift at each panel l(n) = f(n).*(a(na))-((z(n)).*(...

23 jours ago | 0

Answered

How to plot specific values from a matrix of 10*10

M = [0 1 0 2; 0 2 0 3; 0 3 0 4]; colsToPlot = not(all(M==0)); figure plot(M(:,colsToPlot))

How to plot specific values from a matrix of 10*10

M = [0 1 0 2; 0 2 0 3; 0 3 0 4]; colsToPlot = not(all(M==0)); figure plot(M(:,colsToPlot))

23 jours ago | 0

Answered

How to set a column vector as a legend name within multiple plots?

Don't take the transpose: legend(strcat('Alpha=',num2str(a1)))

How to set a column vector as a legend name within multiple plots?

Don't take the transpose: legend(strcat('Alpha=',num2str(a1)))

23 jours ago | 0

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Answered

Index exceeds the number of array elements (1).

When you make this assignment: T_o=10+15.*sin((Hour-9).*(pi/12)); it looks like T_o is a scalar (i.e. length 1), but then you ...

Index exceeds the number of array elements (1).

When you make this assignment: T_o=10+15.*sin((Hour-9).*(pi/12)); it looks like T_o is a scalar (i.e. length 1), but then you ...

23 jours ago | 0

| accepted

Answered

Feature request for postgres support

At least for the first two features, can't you just execute them directly as SQL statements?

Feature request for postgres support

At least for the first two features, can't you just execute them directly as SQL statements?

24 jours ago | 0

Answered

Need to delete outliers by seeing the plot

data = data(data>-4);

Need to delete outliers by seeing the plot

data = data(data>-4);

25 jours ago | 0

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Answered

how to read mixed date and data

I would try the readtable function. You can specify the input formating if needed.

how to read mixed date and data

I would try the readtable function. You can specify the input formating if needed.

25 jours ago | 0

Answered

How can I get multiple plots on one graph, not overlapping?

What an ugly and potentially confusing plotting style. Too bad you are being coerced into doing it that way. One way to do this...

How can I get multiple plots on one graph, not overlapping?

What an ugly and potentially confusing plotting style. Too bad you are being coerced into doing it that way. One way to do this...

25 jours ago | 0

| accepted

Answered

How to convert string to double array in table

% My best guess at your data A = {'[28.346853874154966, 284.04836936606813, 57.820072802912115, 64.72700622938805]'; '[16.5200...

How to convert string to double array in table

% My best guess at your data A = {'[28.346853874154966, 284.04836936606813, 57.820072802912115, 64.72700622938805]'; '[16.5200...

25 jours ago | 0

| accepted

Answered

How can I create a Poll in a community

I am as certain as I can be that only MathWorks staff can create such a poll.

How can I create a Poll in a community

I am as certain as I can be that only MathWorks staff can create such a poll.

25 jours ago | 0

| accepted

Answered

How to delete specific cells according to the condition from cell array?

This line of code will identify the cell locations that have a 7x4 array, having those two elements equal: deleteIdx = cellfun(...

How to delete specific cells according to the condition from cell array?

This line of code will identify the cell locations that have a 7x4 array, having those two elements equal: deleteIdx = cellfun(...

25 jours ago | 1

| accepted

Answered

Is there a way to set the color tag attribute in macOS with MATLAB?

Yes, it is possible. Here is the github repo of a command line tool that will manipulate tags. You can call that command line ...

Is there a way to set the color tag attribute in macOS with MATLAB?

Yes, it is possible. Here is the github repo of a command line tool that will manipulate tags. You can call that command line ...

26 jours ago | 1

| accepted

Answered

How can I get data from evaluating a function, say y=x^2+5 and put it in table?

x = linspace(0.1,0.9,50); y = x.^2+5; tbl = table(y.');

How can I get data from evaluating a function, say y=x^2+5 and put it in table?

x = linspace(0.1,0.9,50); y = x.^2+5; tbl = table(y.');

26 jours ago | 1

| accepted

Answered

Linear regression fit model for Multi-variant responses

I think you need mvregress.

Linear regression fit model for Multi-variant responses

I think you need mvregress.

27 jours ago | 0

Answered

Plotting data against time

New answer based on your update. The problem is that your original time series is in two different formats -- not including the...

Plotting data against time

New answer based on your update. The problem is that your original time series is in two different formats -- not including the...

28 jours ago | 0

| accepted

Answered

Plotting data against time

Works for me, when I correctly specify valid dates using the input format. I'm guessing that your datetime is somehow messed up...

Plotting data against time

Works for me, when I correctly specify valid dates using the input format. I'm guessing that your datetime is somehow messed up...

28 jours ago | 0

Answered

How do I display multiple num2str in a single row

I expect you'd be much better off using sprintf to format your output.

How do I display multiple num2str in a single row

I expect you'd be much better off using sprintf to format your output.

29 jours ago | 0

Answered

Why am I receiving the error "Array indices must be positive integers or logical values."?

Here is a completely different tack, that I think is less confusing because you just defining the function I(z) more naturally a...

Why am I receiving the error "Array indices must be positive integers or logical values."?

Here is a completely different tack, that I think is less confusing because you just defining the function I(z) more naturally a...

29 jours ago | 0

| accepted

Answered

How can I make an exponential fit using two points of my data.

You can use the 'Weights' Name-Value pair, and heavily weight the first point. Here is a made-up example. Notice how f2 passes t...

How can I make an exponential fit using two points of my data.

You can use the 'Weights' Name-Value pair, and heavily weight the first point. Here is a made-up example. Notice how f2 passes t...

29 jours ago | 0

| accepted