Accept 20 answers given by other contributors
Awarded to Brian on 20 Jul 2017
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Matlab Clustering technique with textual data
Hi, I am trying to figure out the best way to cluster numeric information (stock returns) using a series of textual information....
7년 초과 전 | 답변 수: 1 | 0
1
답변질문
How do I efficiently make a large SQL query into Matlab?
I have a SQL table that contains data that I need for analysis which is about 60 million records and 5 fields. What is the best ...
8년 초과 전 | 답변 수: 1 | 1
1
답변질문
Why does Matlab add digits to a code generated vector?
I have a simple command that is creating a vector. Test = (51.7:.1:130)' I then iterate through this vector and use the valu...
8년 초과 전 | 답변 수: 1 | 0
1
답변질문
Table to Matrix from SQL Query
Hi, I have a large SQL query that is importing data into my workspace. I intend to create a data matrix and accompanying label v...
8년 초과 전 | 답변 수: 0 | 0
0
답변질문
Parallel Computing with hyper-threading
I run some of my programs via the parallel computing toolbox using a reasonably powerful machine (20 Cores) to accomplish long r...
대략 9년 전 | 답변 수: 0 | 0
0
답변질문
Spreadsheet LinkEX and datetime fields
Hi, I use the Spreadsheet Link EX to transfer data from Matlab to excel quite frequently. Since the datetime data type was intro...
대략 9년 전 | 답변 수: 0 | 0
0
답변질문
GRPSTATS and datetime columns
Hi, I use grpstats to calculate statistics by different variables often. The new datetime format is very useful and I have conve...
대략 9년 전 | 답변 수: 1 | 0
1
답변질문
grpstats flexibility for additional functions
Hi, I am just wondering if the grpstats function can be used with things other than the standard formulas listed on the help pag...
대략 9년 전 | 답변 수: 1 | 0
1
답변질문
Plot single vector from 3D array
I have a 5x5x150 3d array where I am saving a time series of correlations between variables. At the end of my code I'm attemptin...
9년 초과 전 | 답변 수: 1 | 1
1
답변질문
Slow or Laggy Matlab Workspace
Matlab has become unusually unresponsive when I allow it to sit for some time (a few hours to a few days). The type of slowness ...
9년 초과 전 | 답변 수: 5 | 5
5
답변질문
Join or Merge Data
Hi, I have two large cells that I need to effectively "JOIN" together via two fields (one text and one numeric). Say one cell ha...
거의 10년 전 | 답변 수: 1 | 0
1
답변질문
Help Optimize slow Datestr() function performance
I have imported a large text file with textual dates in the format m/d/yyyy. The end result that I need is a numeric date (for e...
10년 초과 전 | 답변 수: 1 | 0
1
답변질문
Fastest way to import single column?
I am attempting to import just a single column (a textual date field) from a large file with many columns and many rows. When I ...
10년 초과 전 | 답변 수: 2 | 0
2
답변질문
Export Data via fprintf printing something else besides NaN
Hi, I have a simple export loop that is writing the contents of a matrix to a text file for another system to read. The issue is...
10년 초과 전 | 답변 수: 1 | 0
1
답변질문
Fastest Way to write data to a text file - fprintf
I am writing a lot of date to a text file one line at a time (1.7 million rows, 4 columns) that is comprised of different data t...
10년 초과 전 | 답변 수: 2 | 1
2
답변질문
Matlab Slow Import using Import preview
I am using the Import function in Matlab to preview the file before import. The file I am importing is rather large (500 MB or s...
대략 11년 전 | 답변 수: 1 | 0
1
답변질문
Database toolbox query not returning all records
I have a fairly simply SQL query that I am running using the database toolbox connecting to a DB2 datasource. For some reason my...
11년 초과 전 | 답변 수: 0 | 0
0
답변질문
How Can I Speed Up My Code
I've got a job that is running a bunch of iterations on a large dataset and taking more time than I'd like. While I'd like to wr...
11년 초과 전 | 답변 수: 2 | 0
2
답변질문
Use eval statement to create Matrices with variables
I am having trouble with some seemingly basic eval syntax. I have a few variables in loops that I'd like to use to create the na...
11년 초과 전 | 답변 수: 2 | 0
2
답변질문
Create location Index from cell arrays
I have a small piece of code that loops through an array and creates an Index location of that value in another cell array. Acco...
거의 12년 전 | 답변 수: 1 | 0
1
답변질문
Importing Matrix from text or csv files
I have a large matrix that I'd like to import, preferably in one command into a few different Matlab variables. I have been atte...
거의 12년 전 | 답변 수: 1 | 0
1
답변질문
Enable Parfor or Vectorization
I'm looking for a faster way to calculate these loops. I've read some about vectorization on Loren's page but I'm not sure that ...
거의 12년 전 | 답변 수: 0 | 0
0
답변질문
Fast Export Method
I have always used the export command to export a dataset to a comma delimited text file. When the files get a little larger (50...
거의 12년 전 | 답변 수: 1 | 0
1
답변질문
Parfor Step
I am attempting to run a ParFor statement with a step function and Matlab is giving me an error "The range of a parfor statement...
거의 12년 전 | 답변 수: 1 | 0
1
답변질문
Matrix to Table format
I have a very large file that received in a matrix format. Because I'm going to write the data to a SQL database table I need to...
거의 12년 전 | 답변 수: 1 | 0
1
답변질문
Parfor Loops
I have the parallel computing toolbox but I have trouble writing loops in a manner that the toolbox likes. Can someone make a su...
거의 12년 전 | 답변 수: 2 | 0
2
답변질문
Scheduling a Matlab Script
I am attempting to schedule a Matlab job each day using the windows scheduler. I am having trouble getting it to run my m file. ...
거의 12년 전 | 답변 수: 1 | 1
1
답변질문
Matlab Database Toolbox
What is an easy way to create table joints using the querybuilder that is available for the database toolbox? I'm just looking f...
거의 12년 전 | 답변 수: 2 | 0
2
답변질문
Matlab Database Toolbox join
I am wrting a SQL query to pull a list of securities from a table that I am connecting to via ODBC connection. What I'd like to ...
거의 12년 전 | 답변 수: 1 | 2
1
답변질문
Import from .txt or .csv
I am importing some large .csv files where I have textual column headers and row headers. I am using the readtext() function fro...
대략 12년 전 | 답변 수: 1 | 0
1
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