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Simon


Last seen: 2 giorni fa |  Attivo dal 2022

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sqlread specific columns/variables from a MySQL table
The answer to my own questiion is fetch. sqlread always reads in the whole table. sqlquery = 'select wanted_column from myTabl...

2 giorni fa | 1

Domanda


sqlread specific columns/variables from a MySQL table
I want to import to Matlab one or a couple specific columns from a table that is stored in MySQL database. sqlread(conn, tablena...

3 giorni fa | 2 risposte | 0

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risposte

Domanda


Functional programming and idea-oriented Git branching strategy
I analyze a set of financial statement data. The end output of this project should be a short list of stocks for investment, not...

5 mesi fa | 1 risposta | 0

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risposta

Domanda


function chaining when one function has multiple outputs
Similar question has been asked before, but I would ask the question in a more specific manner. If the function in the input en...

5 mesi fa | 1 risposta | 0

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Domanda


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...

8 mesi fa | 0 risposte | 0

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Domanda


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...

8 mesi fa | 1 risposta | 0

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Domanda


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...

12 mesi fa | 1 risposta | 0

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Domanda


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...

oltre un anno fa | 0 risposte | 0

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Domanda


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...

oltre un anno fa | 2 risposte | 0

2

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Domanda


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', ',...

oltre un anno fa | 1 risposta | 0

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Risposto
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...

oltre un anno fa | 0

Risposto
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...

oltre un anno fa | 0

Risposto
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...

oltre un anno fa | 0

Domanda


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...

oltre un anno fa | 2 risposte | 0

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Risposto
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...

oltre un anno fa | 0

Domanda


(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...

oltre un anno fa | 1 risposta | 1

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Risolto


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....

oltre un anno fa

Risolto


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

oltre un anno fa

Risolto


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

oltre un anno fa

Risolto


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...

oltre un anno fa

Risolto


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

oltre un anno fa

Risolto


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...

oltre un anno fa

Risolto


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 ...

oltre un anno fa

Risposto
(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) ...

oltre un anno fa | 0

| accettato

Domanda


(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 ...

oltre un anno fa | 1 risposta | 0

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Risposto
(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...

oltre un anno fa | 0

Domanda


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...

oltre un anno fa | 0 risposte | 0

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Domanda


(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 ...

oltre un anno fa | 3 risposte | 0

3

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Domanda


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...

oltre un anno fa | 1 risposta | 0

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Domanda


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...

oltre un anno fa | 1 risposta | 0

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