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JFz


126 total contributions since 2015

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Question


How does function std process complex numbers
In function S = std(A), there are complex numbers in matrix A. How does std calculate on complex numbers? Thanks

5 months ago | 2 answers | 0

2

answers

Question


dir or ls are not working properly
Hi, I have a remote folder and there are many .mat files in it. I can see those files in windows explorer. But in matlab comma...

8 months ago | 1 answer | 0

1

answer

Question


how to convert ,mat data file to R
Hi, I recently got a task to convert a .mat data file into an R datafile. I don't know how about R at all. So I am asking a...

10 months ago | 1 answer | 0

1

answer

Question


Keep getting error: Failed to load the sqljdbc_auth.dll cause: no sqljdbc_auth in java.library.path
Hi, I created a standalone Matlab test app to access a SQL database using JDBC, and deployed it to a Windows 2012 server. But...

1 year ago | 0 answers | 0

0

answers

Question


How to let server or deployed app know where to find DB driver?
Hi, I have a test app, only a few lines to just test the database connection and run a querry via database toolbox. I compiled ...

1 year ago | 1 answer | 0

1

answer

Question


How to use splitApply to get the coefficients of fitlm?
Hi, I have a table dummyTable that I would like to findgroup and then splitApply. The function in the splitApply is fitlm. So...

1 year ago | 1 answer | 0

1

answer

Answered
Strange problem with readtable
Just discovered that when I run the executable, and supply the file name, I cannot add a ";" at the end of the command.

1 year ago | 0

| accepted

Question


Strange problem with readtable
Hi, I wrote a small Matlan 2018a application and it runs smoothly. But after I compiled it into an executable and started to ru...

1 year ago | 1 answer | 0

1

answer

Answered
Need help with innerjoin where innerjoin returns more rows than necessary
Just found what's wrong here. Table B has same rows multiple times.

1 year ago | 0

| accepted

Question


Need help with innerjoin where innerjoin returns more rows than necessary
Hi, I am using innerjoin to join two tables A and B: C = innerjoin(A, B); A has 30 rows and B has 140 rows. After the join, th...

1 year ago | 1 answer | 0

1

answer

Question


How to extract Jan and feb dates from an array of date strings?
Hi, I have an array of cells of date string. I need to extract all the dates in Jan and Feb. How to do that? Thanks a lot!

1 year ago | 2 answers | 0

2

answers

Question


How to assign a number to an array of double?
Hi, I have an array of doubles a. It has integers from 0 to 6. I want to keep the 0s and 2s, but change all other numbers to ...

1 year ago | 1 answer | 0

1

answer

Question


How to calculate regression with dummy variables?
Hi, I am trying to use 2nd degree polynomial regression with dummy variables. Which function should I use? Thanks for any he...

1 year ago | 1 answer | 0

1

answer

Answered
readtable error "Sheet name does not exist or is not supported"
Thanks for the help. I just fixed it! Some the date format in the sheet is not readable in Matlab. I changed the Date format ...

1 year ago | 0

| accepted

Question


readtable error "Sheet name does not exist or is not supported"
Hi, I use readtable all the time but never had this error until today: "Sheet name does not exist or is not supported, To ch...

1 year ago | 1 answer | 0

1

answer

Question


How to replace nan with the mean of the four numbers surrounding it?
Hi, I have a large matrix and there are nan in it. Sometimes a whole row is a nan. How to replace nan with the mean of the ...

1 year ago | 1 answer | 0

1

answer

Question


How to convert a cell array of datetime to an array of datetime
Hi, Is there a simple way to convert a cell array of datetime to an array of datetime without using cellfun? My cell array loo...

1 year ago | 1 answer | 0

1

answer

Question


Error when fastinsert a table into DB vs no error if inserting only one row
Recently upgraded from 2016a to 2018a. Got an error in fastinsert. But if I insert only one row, there is no problem. Here is th...

1 year ago | 0 answers | 0

0

answers

Question


MATLAB 2018a error: Error using actxserver:
Hi, My script that connecting Matlab and Power World is not working after migrated to 2018a. Here is the error: Server cre...

1 year ago | 1 answer | 0

1

answer

Question


How to find out the Proxy Server and port when compiling and installing magicsqaure?
Hi, I am testing the magicsqaure compiling and installing. I can compile without problem. But when installing, it needs Proxy S...

1 year ago | 0 answers | 0

0

answers

Question


Got error in compiling standalone app 2018a
Hi, I am compiling a simple matlab file and got this error: Compiler version: 6.6 (R2018a) Dependency analysis by REQUI...

1 year ago | 0 answers | 0

0

answers

Question


In classdef, how to call a static method from an other class P.c.averages()?
Hi, I am moving to 2018a from 2016a and found this error: External converter methods for package-qualified classes not suppo...

1 year ago | 0 answers | 0

0

answers

Question


Error in 2018a: External converter methods for package-qualified classes not supported
Hi, My code (running perfectly in 2016a) cannot run in 2018a due to an error: External converter methods for package-qualifi...

1 year ago | 1 answer | 0

1

answer

Answered
deploytool error when trying to build an exe-file with 2016a
I have the license but didn't install it. How to install the compiler? Thanks.

1 year ago | 0

Question


deploytool error when trying to build an exe-file with 2016a
Hi, I have purchased the license of Matlab compiler SDK. But when I type deploytool in the command window, I get this error:...

1 year ago | 2 answers | 0

2

answers

Question


How to copy an object that is not a graphic one?
Hi, I have an object of a class which I defined. I would like to make a copy of that object. But copy or copyobj do not seem ...

1 year ago | 2 answers | 0

2

answers

Question


How to concatenate an array of numbers without for loop
Hi, I have an array of integer numbers A = [1, 2, 3]. I would like to concatenate the numbers for use in SQL statement like '(...

1 year ago | 2 answers | 0

2

answers

Question


Splitapply on a matrix of 1X1000
I have a matrix of 1x1000 numbers and my G is 1. When I do the splitapply on it: res = splitapply(@sum, mat, G); The res Is...

2 years ago | 1 answer | 0

1

answer

Question


Problem with print function
Hi, I use print('-f1', filename, '-djpeg') to save a figure into a remote drive and it worked as a charm yesterday. But fo...

2 years ago | 0 answers | 0

0

answers

Question


Calculate R squared from a linear regress
Hi, I have a set of scattered data and I can use the operator "\" to do a linear fit on the data. But is there a simple matl...

2 years ago | 1 answer | 0

1

answer

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