want to read 38 csv files only first and second column?

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muhammad choudhry
muhammad choudhry am 27 Okt. 2020
Kommentiert: KSSV am 27 Okt. 2020
Hi,
I want to read first and second coloumn of the 48 .csv files then plot the data from them coloumns. Once data plotted seaparately then want to apply the circle algoritham to it which will give me the estimated radius of the circle in list or array then I want to plot them against time?
Can you guys help I do not know how to read column 1 and 2 of them 48 files?
  3 Kommentare
muhammad choudhry
muhammad choudhry am 27 Okt. 2020
Bearbeitet: muhammad choudhry am 27 Okt. 2020
file names are like contours0.90....till contours0.137......I have attached the few files only wants to read first 2 columns which represents x and y values of the plot ...z -axis values are not needed which is 3rd column.
muhammad choudhry
muhammad choudhry am 27 Okt. 2020
and this a algoritham code which will then applied to find the radius of the circle I can do manually one by one but that's not a goal.

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Akzeptierte Antwort

Sudhakar Shinde
Sudhakar Shinde am 27 Okt. 2020
Bearbeitet: Sudhakar Shinde am 27 Okt. 2020
csvFile = dir("*.csv") ;
N = length(csvFile) ;
for i = 1:N
data = readtable(csvFile(i).name) ;
iwant = data.Points_0;
iwant1 = data.Points_1;
% do what you want
end
  2 Kommentare
muhammad choudhry
muhammad choudhry am 27 Okt. 2020
what does this line representing ? data = readtable(csvFiles(i).name) as I am getting error in this line does anything req. to change here ?
Unrecognized function or variable 'csvFiles'.
Error in SimuCircle (line 7)
data = readtable(csvFiles(i).name) ;
Sudhakar Shinde
Sudhakar Shinde am 27 Okt. 2020
Bearbeitet: Sudhakar Shinde am 27 Okt. 2020
it was typing error.
use csvFile instead of csvFiles. Corrected in above code lines.

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Weitere Antworten (1)

KSSV
KSSV am 27 Okt. 2020
Bearbeitet: KSSV am 27 Okt. 2020
csvFiles = dir("*.csv") ;
N = length(csvFiles) ;
for i = 1:N
data = csvread(csvFiles(i).name) ; % also read about xlsread
iwant = data(:,1:2) ; % read first two columns
% do what you want
end
  4 Kommentare
Sudhakar Shinde
Sudhakar Shinde am 27 Okt. 2020
Name of csv file contains multiple dots , example: contours0.90.csv and looks like csvread producess error for this.
Use readtable or readmatrix instead.
KSSV
KSSV am 27 Okt. 2020
There is a typo error..edited the code.....

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