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Sebastiano delre


15 total contributions since 2013

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Question


regress and/or fitlm with more than 1000 dummies
I am trying to run a regression model on a dataset with about 600,000 observations and 1008 dummies. I am using fitlm but Matlab...

3 years ago | 0 answers | 0

0

answers

Answered
Deleting duplicate observations from a dataset
Wowwww, much easier than I expected. Thanks much!

3 years ago | 0

Question


Deleting duplicate observations from a dataset
I have a large dataset and I want to delete duplicate observations. I do not want to use the function unique because it compares...

3 years ago | 2 answers | 0

2

answers

Question


Importing data using textscan from a large dataset
I would like to import data from a csv file. The data looks like in the example attached. There are 14 variables, with a header ...

3 years ago | 1 answer | 0

1

answer

Question


Using regexp to create dataset
I have imported a large database using textscan(). Now I have data with 12 variables. Each observation looks like this: 5,57...

3 years ago | 3 answers | 0

3

answers

Question


Importing a large database using dataset
I have a very large database (3GB) in a CSV format. I have a RAM of 8GB. Do you think I can import it using dataset? How long sh...

3 years ago | 1 answer | 0

1

answer

Question


Importing only a fraction of a database using dataset
I have a large dataset in csv format (400MB). How can I import in MatLab only the first 500 rows?

3 years ago | 1 answer | 0

1

answer

Answered
My parallel computing code (R2013b) is very slow
Thank you!

5 years ago | 0

Question


My parallel computing code (R2013b) is very slow
Hi! I am trying to use parallel computing and parfor loops with my R2013b MatLab version. I can already use parfor cycles but ...

5 years ago | 2 answers | 0

2

answers

Question


the exp function does not work
It may look like a simple problem but I cannot get my way through. When using exp(2), I get an "Index exceeds matrix dimension...

5 years ago | 1 answer | 0

1

answer

Question


accessing specific records of a given dataset
Hello! I have the following 5x4 dataset, called DB: val = line title replyno author 1 ...

6 years ago | 1 answer | 0

1

answer

Question


getting rid of empty cells in a cell array
Hi, can you please help me with this? I have the following cell array x = {1,[],'ciao',[],[]}; I want to exclude the ...

6 years ago | 2 answers | 0

2

answers

Answered
sorting without moving NaNs
I am sorry. Actually I wrongly state my problem. I have A=[6 20; 10 10; 3 NaN; 20 66; 4 NaN; 7 12] and I would like to get A=[2...

6 years ago | 0

Question


sorting without moving NaNs
How can I sort an array without moving the NaN elements? I have |A=[20 10 NaN 66 NaN 12]| and I would like to get |A=[66 20 N...

6 years ago | 5 answers | 0

5

answers

Question


looking for a command
How can I get from A=[21 3 NaN NaN] to A=[21 3 0 0] without using a for cycle?

6 years ago | 2 answers | 0

2

answers