# How to get specific rows from CVS?

**URL:** https://discourse.paraview.org/t/how-to-get-specific-rows-from-cvs/8076
**Category:** ParaView Support
**Created:** [September 24, 2021, 12:11pm UTC](https://discourse.paraview.org/t/how-to-get-specific-rows-from-cvs/8076 "2021-09-24T12:11:22Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![joaocqmiranda](https://discourse.paraview.org/user_avatar/discourse.paraview.org/joaocqmiranda/32/6641_2.png) [@joaocqmiranda](https://discourse.paraview.org/u/joaocqmiranda)
#### Post date: [September 24, 2021, 12:11pm UTC](https://discourse.paraview.org/t/how-to-get-specific-rows-from-cvs/8076/1 "2021-09-24T12:11:22Z")

</div>

This is my code i think needed a function different from this output.RowData.append().  
Because it is doing the substitution of an array instead of adding another array in another row.

```auto
   # Code for 'Script'

# We will use NumPy to read the csv file.
# Refer to NumPy documentation for genfromtxt() for details on
# customizing the CSV file parsing.

import numpy as np
# assuming data.csv is a CSV file with the 1st row being the names names for
# the columns
def m(v):                                    
  ma=[v[0],v[4],v[8],v[12],v[1],v[5],v[9],v[13],v[2],v[6],v[10],v[14],v[3],v[7],v[11],v[15]]
  return ma
data = np.genfromtxt("C:\\Users\\joaoc\\OneDrive - Instituto Superior de Engenharia de Lisboa\\ISEL\\Mestrado\\Tese\\0-ProjetosPy\\Pro-Paraview\\Example_DAP\\selipsoids3.str", dtype=None, skip_header=1,
names=m(['M11','M12','M13','M14',
         'M21','M22','M23','M24',
         'M31','M32','M33','M34',
         'M41','M42','M43','M44']))

cc = 1 # inicial row
ncx =3 # number of rows that it should jump to select the next one  
ii = 0
ntrow=2400 #Numeber of rows from original file
for i in range(0,ntrow):
   if i == ii*ncx + cc:
      for name in data.dtype.names:
         array = data[name]
         output.RowData.append(array[ii], name)
         ii=ii+1

```