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Simon


Last seen: etwa 2 Monate vor |  Aktiv seit 2022

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my license for database toolbox isn’t linked to mobile Matlab
I have bought the license of Database Toolbox and it wotks fine in Mac. When I try to connect with an sqlite .db file in the iPa...

2 Monate vor | 0 Antworten | 0

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sqlite ignore project path?
I have a sqlite database, say "filename.db", in a local folder (MacOS). The folder is then added to my project path. However, sq...

2 Monate vor | 1 Antwort | 0

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Frage


How to select non-string variables convertvars( ) argument?
I want to convert non-string variables to string using convertvars. I can do convertvars(T, @isnumeric, 'string') and convertvar...

6 Monate vor | 1 Antwort | 0

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Frage


What is the best folder organization for a large data analysis project with multilayered subprojects?
My project involves several subprojects. They should be completed in a sequential manner. And each subproject involves different...

10 Monate vor | 0 Antworten | 0

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Is there a parallel version of splitapply()?
Group-based computation is naturally sutiable for parallel computation. I wonder why Matlab has not yet a built-in parfor-splita...

10 Monate vor | 2 Antworten | 0

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Frage


readtable(html file) producing extra empty columns
Original question: In another thread, similar question was asked for readtable(csv file). The answer was to set {'delimiter', ',...

11 Monate vor | 1 Antwort | 0

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Beantwortet
What should go in a next-generation MATLAB X?
Insert 'parfor' option into splitapply( ), grouptransform( ) or create separate parallel versions of those two functions. Righ...

11 Monate vor | 0

Beantwortet
What should go in a next-generation MATLAB X?
@Andrew Janke Do you cast your table variables to categorical? In my case, if a task is to process strings, it will be many-time...

11 Monate vor | 0

Beantwortet
What should go in a next-generation MATLAB X?
My wish list, not about code improvement but about official tutorials. a tutorial of using splitapply to take advantage of para...

11 Monate vor | 0

Frage


Why doesn't parfeval(@splitapply) improve splitapply's performance?
I want to readtable many html-files to extract tables. I wrote a function extract_sheet to do just that. I had used parfor to pe...

11 Monate vor | 2 Antworten | 0

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What should go in a next-generation MATLAB X?
Better folder path utility. Python's pathlib is powerful and very intuitive to use. Matlab's dir is cumbersome. To be the proble...

11 Monate vor | 0

Frage


(par)for k=1:N end; select for or parfor loop without code replication
I like to use for-loop or parfor-loop with function input flag. One way to do that is using if-else with code replication. I won...

11 Monate vor | 1 Antwort | 1

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Gelöst


Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

11 Monate vor

Gelöst


Find max
Find the maximum value of a given vector or matrix.

11 Monate vor

Gelöst


Inner product of two vectors
Find the inner product of two vectors.

11 Monate vor

Gelöst


Find Air Temperature from Cricket Stridulation Rate
Stridulation is the process that creates a cricket's “chirp” by rubbing their wings or legs. According to the Old Farmer's Alma...

11 Monate vor

Gelöst


Get the length of a given vector
Given a vector x, the output y should equal the length of x.

11 Monate vor

Gelöst


Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

11 Monate vor

Gelöst


Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

11 Monate vor

Beantwortet
(revised) What is the right way to apply parallel.pool.Constant on functional handle?
I think I found the solution: feval(). It's in the help page of broadcast variable and parfor. function res = iter_test(f, T) ...

12 Monate vor | 0

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Frage


(revised) What is the right way to apply parallel.pool.Constant on functional handle?
(original question) I use parfor-loop to process through rows of table/array. In each iteration, a function handle is called to ...

12 Monate vor | 1 Antwort | 0

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Beantwortet
(problem solved, question revised) How to select table rows with varargin and not using logical condition as input argument.
@Steven Lord I think I finally figure out how to do it based on your algorithm. Great thanks for your generous help. I think the...

etwa ein Jahr vor | 0

Frage


How to write one universal function to evaluate many equations?
I am working on verifying whether if equations are valid over a large data set. The challenge is that the number of equations to...

etwa ein Jahr vor | 0 Antworten | 0

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(problem solved, question revised) How to select table rows with varargin and not using logical condition as input argument.
(original question)"I have tables. Selecting rows where values meet logical conditions from them is a frequent task. It becomes ...

etwa ein Jahr vor | 3 Antworten | 0

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Frage


a philosophical question regarding function (how many tasks should be wrapped inside a function?)
My data have two types of tables. They share common columns, and the second type has extra columns. I couldn't decide whether i...

etwa ein Jahr vor | 1 Antwort | 0

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Frage


What toolboxes should I get to do speech formant analysis in real time?
I want to record speech sound with a mucrophone, and have its formants analyzed and displayed in real time. Hopefully the spectr...

etwa ein Jahr vor | 1 Antwort | 0

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Frage


Is there a less bug-prone way to include quote in selector string variable when defining opt.TableSelector?
My situation is to readtable( ) several tables, each of which has a specific title, from an html file. I have come up with a co...

etwa ein Jahr vor | 1 Antwort | 0

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Beantwortet
Storing a .mat file in mysql database
In my own experience I have tried three different approaches to store tables in MySQL. I also use Workbench (UI for MySQL comman...

etwa ein Jahr vor | 0

Frage


How to access data of regexp output (without temporary variable)?
I know how to convert the output from regexp( ) to a table by intermediating through a temporary variable as this solution: str...

etwa ein Jahr vor | 4 Antworten | 0

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Frage


use unstack to reshape table with dummy variable (edited: alternative crosstab method)
After I sort table according to a group variable, I like to put the group value as the 'header' column and put its members in th...

mehr als ein Jahr vor | 2 Antworten | 0

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