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Azura Hashim


Last seen: 3年以上 前 |  2016 年からアクティブ

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質問


Cointegration function for many variables
Is there a function or script similar to corrcoef that can return cointegration results in a matrix form, without the need for a...

4年弱 前 | 0 件の回答 | 0

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質問


How to replace ismissing values in tables
I'm reading a text file into a table and Matlab is returning some values in the table as [1×1 missing]. I would like to replace...

5年弱 前 | 0 件の回答 | 0

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質問


Exponential moving average doesn't seem to work properly
Hi, I have a question about the moving average function: ma = movavg(Data,type,windowSize) In the following example: movavg(...

5年弱 前 | 2 件の回答 | 0

2

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質問


Interactive broker timeseries vs history?
What is the difference between Interactive Broker timeseries and history functions? They seem to be returning the same data. Di...

約5年 前 | 1 件の回答 | 0

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質問


Data access performance tips
Hi, Need some tips please. I need fast performance when: 1) Reading datafiles saved to disk 2) Accessing and modifying data w...

5年以上 前 | 0 件の回答 | 0

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質問


Java heap space error
Hi, Got the error below: Exception in thread "Thread-35": java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.co...

5年以上 前 | 1 件の回答 | 0

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質問


IQFeed market depth and time series not working
Hi, The following didn't work for me. Help please. Retrieving market depth data - Got the error "The variable IQFeedLevelTwoDa...

5年以上 前 | 1 件の回答 | 0

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質問


timeout on input prompt
Hi, I need to implement a timeout on an input prompt. I have found similar questions but all the answers implement a dialog b...

6年以上 前 | 1 件の回答 | 0

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質問


Feature selection with NaN
Hi, I have a high dimensional data where I've managed to build a classification model using fitctree that is returning satisf...

7年弱 前 | 1 件の回答 | 0

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質問


How to optimise classification learner for a specific class
Hi, Is it possible in the classification learner app to prioritise the accuracy for a specific class? For example, if I have ...

7年弱 前 | 1 件の回答 | 0

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質問


Vectorizing a loop calculation
Hi, Is it possible to convert the loop below into a vector calculation? Thank you. dataset=table(); dataset.value=rand(...

7年弱 前 | 0 件の回答 | 0

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質問


Visualising matlab results in PowerBI
Is there a way of using PowerBI to visualise variables in the Matlab workspace, without having to write the data to a file or da...

約7年 前 | 3 件の回答 | 0

3

回答

質問


Fast and simple trend
Hi, I need a fast and simple way to calculate the trend of a variable at each point in time for data over the preceding 1 hou...

約7年 前 | 2 件の回答 | 0

2

回答

質問


database returns null as -2147483648
When I executed a query using MySQL console null values returned correctly. But when I queried the same data using database func...

7年以上 前 | 0 件の回答 | 0

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質問


Converting loop to vector operation
Hi, I have a large dataset where I calculate the value of some result in each row based on data in preceding rows. Currently ...

7年以上 前 | 1 件の回答 | 0

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質問


Asynchronous parallel processing when a worker is available
Hello, I need to write a script that: # Builds an input array for a function. # When there is an available worker, assig...

8年弱 前 | 1 件の回答 | 0

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質問


Array function for ranges
Hi, I have a binary image in a matrix, call it binarymage. I then want to determine whether various areas in the image are wh...

約8年 前 | 2 件の回答 | 0

2

回答

質問


High speed OCR and parallel processing
Hello, I've written a number of programs to read tabular data in images using Matlab's ocr function. I have cleaned up the im...

約8年 前 | 1 件の回答 | 0

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質問


Reading table from screen
Hi, I need to continuously read tabular data from a browser into Matlab arrays. Scraping is not an option. I came across an O...

約8年 前 | 0 件の回答 | 0

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質問


Recommendation for Matlab consultant
Hi I'm looking for a Matlab consultant to write some programs. I know of Yair Altman but also looking for other consultants out ...

8年以上 前 | 0 件の回答 | 0

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質問


Fast data access (database or store in array)?
Hi, I have data stored in a local mysql database but it takes a few seconds for Matlab to do the query and read it into a mat...

8年以上 前 | 0 件の回答 | 0

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質問


table variable name based on array
Hi, is it possible to assign table variable name based on strings in an array. For example: colnames={'a' 'b'}; a=[1;2];...

8年以上 前 | 2 件の回答 | 0

2

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回答済み
Database toolbox downloading individual data as cell arrays
Excellent, this works. Thanks for your help.

8年以上 前 | 0

質問


Database toolbox downloading individual data as cell arrays
Hi, I am using database toolbox to fetch data using MySql. However the fetched data matrix consists of individual values as cell...

8年以上 前 | 2 件の回答 | 0

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回答