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# Salma fathi

Last seen: 5 days ago Active since 2021

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Accessing each matrix in a cell array of size ~8GB and filter it
I have the follwing cell array, I am trying to access each cell in it and check the 4th and 5th column inside each matrix in...

13 days ago | 1 answer | 0

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How to plot the following figure in matlab?
I am looking for a simple way to plot a three plots diagram as the one shown in the figure below, it is enogh if I can get the s...

15 days ago | 1 answer | 0

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Detect all local minimum and remove them
I am trying to do some 'correction' on the curve in the attached figuer (blue in the original curve and green is the one we desi...

1 month ago | 3 answers | 1

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How to skip years with no data when reading the data from a website
I am trying to read some data from a website in the following manner: we have multiple stations to read data from and for each ...

1 month ago | 1 answer | 0

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How to find the maximum point of a fitted curve
I am trying to find the maximum point of a fitted curve, the fitting method is being done using smoothing splines. I have looked...

1 month ago | 2 answers | 0

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Question

Hello, Ia m trying to read some data from the follwing website, I tried to use webread to acheive this but it would give me an a...

2 months ago | 1 answer | 0

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converting a variable in a table from cell to double
I am trying to read some tables and concatenate them in one big table, but I am getting the following error Cannot concatenate ...

2 months ago | 1 answer | 0

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Reading data from a different URL each iteration
i am trying to read some data from a specific website, in this website there are some parametrs that we need to set to get the d...

2 months ago | 1 answer | 0

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Question

comparing two times to find the nearest minute for a specific time
we have two tabels A and B each of which have column representing the date and time in the format "uuuuMMddHHmm", we would like ...

2 months ago | 1 answer | 0

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Question

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...

4 months 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 ...

4 months 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...

4 months ago | 1 answer | 0

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Question

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...

4 months 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...

4 months 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...

5 months ago | 2 answers | 0

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Question

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?

5 months 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...

5 months 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) ...

6 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 ...

6 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...

6 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...

6 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...

7 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, ...

8 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...

8 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...

8 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...

8 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))...

10 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...

10 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...

11 months ago | 1 answer | 0