Community Profile # Salma fathi

Last seen: 1 day ago Active since 2021

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splitting dataset into training and testing
Hello, We are trying to split some data into training and testing datasets, 80% to 20% respectively, and we are having the fol...

9 days ago | 1 answer | 0

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Question

Finding outliers in a dataset
Hello, shown in the image are the plots for the dataset I am having. I am trying to clean out the dataset from outliers so that ...

16 days ago | 1 answer | 0

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Question

finding a specific peak point in a table
Hello, attached is a table of data where we are intrested in locating the peak point according to a certain criteria, it shoul...

23 days ago | 1 answer | 0

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finding the maximum within a specific range
Hello, for the attached table we would like to find the index of the max point of the variable NE8 within the range of (200,400...

24 days ago | 2 answers | 0

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Question

how to only change the cells with NAN values in a table?
I am trying to apply the following operation on certain rows in a tabel of data [Lia, Locb] = ismember(datatable2.Date, EDPALL...

26 days ago | 1 answer | 0

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Question

filtering data inside a table and storing multiple tables in one big table
i am trying to do the following After reading some data files where each file contains data stored in a table. we find the ma...

29 days ago | 2 answers | 0

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convert dates to specific format
how can I change the format of the dates in the column shown in the image to the format uuuuMMddHHmm?

1 month ago | 2 answers | 0

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how to concatenate two tables efficiently
I am trying to read a huge amount of files, each file would have data stored in a atable in it, after reading the files we would...

1 month ago | 2 answers | 0

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Question

How to make the following code valid for tables not only matrices
hello, The following code finds the peak point for some data stored in an array or matrix lets say. for ied=1:length(EDP) ...

2 months ago | 2 answers | 0

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Question

Error: Row index exceeds table dimensions.
Hello, I am stuck at some point with this error . I am attaching a small sample of the file that contains the table SOLARL that ...

2 months ago | 1 answer | 0

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Question

extracting 20% of the data from a table
i have the following data table that represents the curve that is is shown in the plot, at row number 9 in this table we have th...

2 months ago | 1 answer | 0

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Question

plotting three curves in the same plot
I have plotted the follwing two curves as in the image below (fig2). For the curve in red I have used a matlab generated cod...

2 months ago | 1 answer | 0

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Question

Solving an initial value problem for a PDE
Having the following initial value problem with some mathematical computations we reach to an end that an implicit general s...

4 months ago | 1 answer | 0

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Question

finding the slope of each segement in a fitted curve
having the following plot, Is there a method that would allow me to find the slope of each segment in this plot or at least, ...

4 months ago | 2 answers | 0

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Question

reading multiple text file from two different folders using nested for loop
i am using the following lines to read multiple text files and do some comparison between them. Baiscally the first loop will r...

5 months ago | 1 answer | 0

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Question

comparing the minutes values of two tables
I am trying to make a comparison between the minutes value of the time from two tables using the following lines first we checc...

5 months ago | 1 answer | 0

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Question

converting date and time string to datetime object
I am trying to read several text files each has 4 variables, the first coumn has the date and time values otgether in the follow...

5 months ago | 1 answer | 0

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Question

adding a date column to a matrix
haveing the followoing matrix EDP = [double(netcdf.getVar(ncid,0)),double(netcdf.getVar(ncid,1)),double(netcdf.getVar(ncid,2))...

7 months ago | 1 answer | 0

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Question

extracting files having names with the same date from a dataset
I am having some txt files as a training dataset for a modele I'm trying to build. if we asumed that the txt files names has t...

7 months ago | 3 answers | 0

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Question

how to copy specific columns of a matrix to a table
I have a matrix of six columns each column for a variable (Altitude, Latitude, Longitude, Azimuth, TEC, Ne). and a table of 3 co...

8 months ago | 1 answer | 0

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Question

Grouping data into bins and then plotting them
Hello, I am trying to read some tables into matlab, the tables contain the variable 'hour' to represent the time when the data a...

10 months ago | 1 answer | 0

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Question

deleting unneeded columns from tables after using them
I need one little help in the follwoing: the code I attached is supposed to read some files as tables. split a table into small...

11 months ago | 1 answer | 0