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Nadeera Gunartna


Active since 2016

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How to extract multiple matches into separate rows?
I have a CSV file (see attached), from the file i want to extract values in the column M (Cab/100kg=f) related to each group (x...

7 years ago | 1 answer | 0

1

answer

Question


how can i delete unnecessary rows in a dataset?
Dear Colleagues, Herewith I am attaching my dataset. I want to delete the full rows that contain "GB","RW","AR", "AM" and "NB"....

7 years ago | 3 answers | 0

3

answers

Question


how to refer an element in a column to related a value in another cloumn?
I have a data set as attached. 6th column represent the time. I want to find the value in the 2nd Column related to "GX" in 1st ...

8 years ago | 1 answer | 0

1

answer

Question


PDF calcutaion and graphs
I have different types of datasets, by looking at the data set we can not tell what type of distribution it has. so, how can I p...

8 years ago | 1 answer | 0

1

answer

Question


How to calculate the area under the curve for each time gap using "trapz" command?
I wanted to calculated the area under the curve of X vs T graph. Here is the data set: disp([T(:,5),X(:,5)]) ...

8 years ago | 1 answer | 0

1

answer

Question


How to use 'trapz' command to calculate the area under the curve for each time gap of a graph?
T Y 1.00 2988.00 1.00 2966.00 1.00 2915.00 1.00...

8 years ago | 1 answer | 0

1

answer

Question


How to do the summation of two graphs?
Dear Colleagues, I have two different graphs with different Y values and x values. it is hard to predict an equation with mi...

8 years ago | 2 answers | 0

2

answers

Question


How can I combine charactor array with a numerical arrays?
I have more than 1000 data sets like the attached file, just need to extract all the details except GG and NN. I jus use the fo...

9 years ago | 1 answer | 0

1

answer

Question


How can I do the rolling sum of 5 elements for each column? I have a dataset like this, and would be greatful, someone can help me to write a code for rolling sum of 5 elements of each column.
da = 39.00 34.00 40.00 38.00 151.00 47.00 33.00 35.00 ...

9 years ago | 1 answer | 0

1

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Question


How can i extract all element except 'SP' 'NS''GX' and need to put it as a colum with numeric columns?
I have 100 data set like follows, 'GX' is always in the end, but 'SP', 'NS' positions can change other data sets. I would be t...

9 years ago | 1 answer | 0

1

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Question


I have a data set as below , How can i assign T values : 49 as 1 and 53 as 5 and so on considering the gap between the time (49,53,54...10,16) in seconds, it is always not 4 s at the begining and end , it vary as 2 s , 3 s, and so on... i would be
T(s) Cnt 49.00 804.00 53.00 717.00 54.00 613.00 55.00 603.00 56.00 630.00 57.00 580.00 58.00 566.00 59...

9 years ago | 1 answer | 0

1

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Question


I have a data set like this, How can i delete raw ofs values less than 10, and T values which are zero, How can i sum s values which are related to same T values ?
S T 878.00 9.00 1.00 12.00 166.00 12.00 143...

9 years ago | 1 answer | 0

1

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