Numpy 2d array extrude

up vote
0
down vote

favorite

I am new to numpy ndarrays and i couldn`t find any solution for my issue.
I have say 10 files of floating point data. I apply some operation for every pair of files, that returns 1D array.

What I want is to have block matrix A[10x10] with rows and cols are my ten files and every element in that matrix is block of 1D array that results my operation applied to f_i and f_j.

I gues i need some kind of map, so that i could tell "This f_i and f_j result in certain array" and could access this array by f_i, f_j.

What would be the best way to achive this? Endpoint of that task is to output this matrix into csv file.

Data schema:

data schema

edited Nov 10 at 13:12

asked Nov 10 at 12:47

takeshi6

113

6

I think it might be better if you give an example with some sample data. Right now it is not completely clear what you aim to do.
– Willem Van Onsem
Nov 10 at 12:49

Added picture representing my issue in EDIT
– takeshi6
Nov 10 at 13:02

add a comment |

up vote
0
down vote

favorite

I am new to numpy ndarrays and i couldn`t find any solution for my issue.
I have say 10 files of floating point data. I apply some operation for every pair of files, that returns 1D array.

What I want is to have block matrix A[10x10] with rows and cols are my ten files and every element in that matrix is block of 1D array that results my operation applied to f_i and f_j.

I gues i need some kind of map, so that i could tell "This f_i and f_j result in certain array" and could access this array by f_i, f_j.

What would be the best way to achive this? Endpoint of that task is to output this matrix into csv file.

Data schema:

data schema

edited Nov 10 at 13:12

asked Nov 10 at 12:47

takeshi6

113

6

I think it might be better if you give an example with some sample data. Right now it is not completely clear what you aim to do.
– Willem Van Onsem
Nov 10 at 12:49

Added picture representing my issue in EDIT
– takeshi6
Nov 10 at 13:02

add a comment |

up vote
0
down vote

favorite

I am new to numpy ndarrays and i couldn`t find any solution for my issue.
I have say 10 files of floating point data. I apply some operation for every pair of files, that returns 1D array.

What I want is to have block matrix A[10x10] with rows and cols are my ten files and every element in that matrix is block of 1D array that results my operation applied to f_i and f_j.

I gues i need some kind of map, so that i could tell "This f_i and f_j result in certain array" and could access this array by f_i, f_j.

What would be the best way to achive this? Endpoint of that task is to output this matrix into csv file.

Data schema:

data schema

edited Nov 10 at 13:12

asked Nov 10 at 12:47

takeshi6

113

I am new to numpy ndarrays and i couldn`t find any solution for my issue.
I have say 10 files of floating point data. I apply some operation for every pair of files, that returns 1D array.

What I want is to have block matrix A[10x10] with rows and cols are my ten files and every element in that matrix is block of 1D array that results my operation applied to f_i and f_j.

I gues i need some kind of map, so that i could tell "This f_i and f_j result in certain array" and could access this array by f_i, f_j.

What would be the best way to achive this? Endpoint of that task is to output this matrix into csv file.

Data schema:

data schema

python arrays numpy multidimensional-array

edited Nov 10 at 13:12

asked Nov 10 at 12:47

takeshi6

113

edited Nov 10 at 13:12

asked Nov 10 at 12:47

takeshi6

113

edited Nov 10 at 13:12

asked Nov 10 at 12:47

takeshi6

113

asked Nov 10 at 12:47

takeshi6

113

asked Nov 10 at 12:47

takeshi6

113

6

I think it might be better if you give an example with some sample data. Right now it is not completely clear what you aim to do.
– Willem Van Onsem
Nov 10 at 12:49

Added picture representing my issue in EDIT
– takeshi6
Nov 10 at 13:02

add a comment |

6

I think it might be better if you give an example with some sample data. Right now it is not completely clear what you aim to do.
– Willem Van Onsem
Nov 10 at 12:49

Added picture representing my issue in EDIT
– takeshi6
Nov 10 at 13:02

I think it might be better if you give an example with some sample data. Right now it is not completely clear what you aim to do.
– Willem Van Onsem
Nov 10 at 12:49

Added picture representing my issue in EDIT
– takeshi6
Nov 10 at 13:02

add a comment |

3 Answers
3

active

oldest

votes

up vote
0
down vote

accepted

Maybe you can accomplish your goal just using a nested list (https://docs.python.org/3.7/tutorial/datastructures.html#nested-list-comprehensions):

# build a 10x10 matrix with default value 0

matrix = [[0 for i in range(10)] for j in range(10)]

# assign the result to a cell

matrix[1][1] = ['result', 'of', 'some', 'operation']

# retrieve the result

print (matrix[1][1])

#=> ['result', 'of', 'some', 'operation']

edited Nov 10 at 14:34

answered Nov 10 at 14:29

iGian

2,9622622

Thanks for that advice, it seems to work. Guess i just i got confused that using np.ndarrays in my previous calculations means i have to use it till the very end)
– takeshi6
Nov 10 at 18:18

add a comment |

up vote
0
down vote

You may use np.append method in numpy.
You can check the details in numpy.append

answered Nov 10 at 12:54

DwayneChen

I need to insert at certain index, not at the end
– takeshi6
Nov 10 at 13:04

I see. Then you can try a 3-d dataframe. But it's not recommended.
– DwayneChen
Nov 10 at 13:42

add a comment |

up vote
0
down vote

I think you could do this pretty cleanly with a dictionary like so:

file_pairs_table = {}

file_a = "file_a.txt"

file_b = "file_b.txt"

file_pairs_table[(file_a,file_b)] = np.arange(999) #operation resulting in 1d array here.

Then access the value of the file pair like this:

file_pairs_table[(file_a,file_b)]

>>> array([0,1,...,998])

answered Nov 10 at 22:57

Doug7

212

add a comment |

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

up vote
0
down vote

accepted

Maybe you can accomplish your goal just using a nested list (https://docs.python.org/3.7/tutorial/datastructures.html#nested-list-comprehensions):

# build a 10x10 matrix with default value 0

matrix = [[0 for i in range(10)] for j in range(10)]

# assign the result to a cell

matrix[1][1] = ['result', 'of', 'some', 'operation']

# retrieve the result

print (matrix[1][1])

#=> ['result', 'of', 'some', 'operation']

edited Nov 10 at 14:34

answered Nov 10 at 14:29

iGian

2,9622622

Thanks for that advice, it seems to work. Guess i just i got confused that using np.ndarrays in my previous calculations means i have to use it till the very end)
– takeshi6
Nov 10 at 18:18

add a comment |

up vote
0
down vote

accepted

Maybe you can accomplish your goal just using a nested list (https://docs.python.org/3.7/tutorial/datastructures.html#nested-list-comprehensions):

# build a 10x10 matrix with default value 0

matrix = [[0 for i in range(10)] for j in range(10)]

# assign the result to a cell

matrix[1][1] = ['result', 'of', 'some', 'operation']

# retrieve the result

print (matrix[1][1])

#=> ['result', 'of', 'some', 'operation']

edited Nov 10 at 14:34

answered Nov 10 at 14:29

iGian

2,9622622

Thanks for that advice, it seems to work. Guess i just i got confused that using np.ndarrays in my previous calculations means i have to use it till the very end)
– takeshi6
Nov 10 at 18:18

add a comment |

up vote
0
down vote

accepted

Maybe you can accomplish your goal just using a nested list (https://docs.python.org/3.7/tutorial/datastructures.html#nested-list-comprehensions):

# build a 10x10 matrix with default value 0

matrix = [[0 for i in range(10)] for j in range(10)]

# assign the result to a cell

matrix[1][1] = ['result', 'of', 'some', 'operation']

# retrieve the result

print (matrix[1][1])

#=> ['result', 'of', 'some', 'operation']

edited Nov 10 at 14:34

answered Nov 10 at 14:29

iGian

2,9622622

Maybe you can accomplish your goal just using a nested list (https://docs.python.org/3.7/tutorial/datastructures.html#nested-list-comprehensions):

# build a 10x10 matrix with default value 0

matrix = [[0 for i in range(10)] for j in range(10)]

# assign the result to a cell

matrix[1][1] = ['result', 'of', 'some', 'operation']

# retrieve the result

print (matrix[1][1])

#=> ['result', 'of', 'some', 'operation']

edited Nov 10 at 14:34

answered Nov 10 at 14:29

iGian

2,9622622

edited Nov 10 at 14:34

answered Nov 10 at 14:29

iGian

2,9622622

answered Nov 10 at 14:29

iGian

2,9622622

answered Nov 10 at 14:29

iGian

2,9622622

Thanks for that advice, it seems to work. Guess i just i got confused that using np.ndarrays in my previous calculations means i have to use it till the very end)
– takeshi6
Nov 10 at 18:18

add a comment |

Thanks for that advice, it seems to work. Guess i just i got confused that using np.ndarrays in my previous calculations means i have to use it till the very end)
– takeshi6
Nov 10 at 18:18

Thanks for that advice, it seems to work. Guess i just i got confused that using np.ndarrays in my previous calculations means i have to use it till the very end)
– takeshi6
Nov 10 at 18:18

add a comment |

up vote
0
down vote

You may use np.append method in numpy.
You can check the details in numpy.append

answered Nov 10 at 12:54

DwayneChen

I need to insert at certain index, not at the end
– takeshi6
Nov 10 at 13:04

I see. Then you can try a 3-d dataframe. But it's not recommended.
– DwayneChen
Nov 10 at 13:42

add a comment |

up vote
0
down vote

You may use np.append method in numpy.
You can check the details in numpy.append

answered Nov 10 at 12:54

DwayneChen

I need to insert at certain index, not at the end
– takeshi6
Nov 10 at 13:04

I see. Then you can try a 3-d dataframe. But it's not recommended.
– DwayneChen
Nov 10 at 13:42

add a comment |

up vote
0
down vote

You may use np.append method in numpy.
You can check the details in numpy.append

answered Nov 10 at 12:54

DwayneChen

You may use np.append method in numpy.
You can check the details in numpy.append

answered Nov 10 at 12:54

DwayneChen

answered Nov 10 at 12:54

DwayneChen

answered Nov 10 at 12:54

DwayneChen

answered Nov 10 at 12:54

DwayneChen

I need to insert at certain index, not at the end
– takeshi6
Nov 10 at 13:04

I see. Then you can try a 3-d dataframe. But it's not recommended.
– DwayneChen
Nov 10 at 13:42

add a comment |

I need to insert at certain index, not at the end
– takeshi6
Nov 10 at 13:04

I see. Then you can try a 3-d dataframe. But it's not recommended.
– DwayneChen
Nov 10 at 13:42

I need to insert at certain index, not at the end
– takeshi6
Nov 10 at 13:04

I see. Then you can try a 3-d dataframe. But it's not recommended.
– DwayneChen
Nov 10 at 13:42

add a comment |

up vote
0
down vote

I think you could do this pretty cleanly with a dictionary like so:

file_pairs_table = {}

file_a = "file_a.txt"

file_b = "file_b.txt"

file_pairs_table[(file_a,file_b)] = np.arange(999) #operation resulting in 1d array here.

Then access the value of the file pair like this:

file_pairs_table[(file_a,file_b)]

>>> array([0,1,...,998])

answered Nov 10 at 22:57

Doug7

212

add a comment |

up vote
0
down vote

I think you could do this pretty cleanly with a dictionary like so:

file_pairs_table = {}

file_a = "file_a.txt"

file_b = "file_b.txt"

file_pairs_table[(file_a,file_b)] = np.arange(999) #operation resulting in 1d array here.

Then access the value of the file pair like this:

file_pairs_table[(file_a,file_b)]

>>> array([0,1,...,998])

answered Nov 10 at 22:57

Doug7

212

add a comment |

up vote
0
down vote

I think you could do this pretty cleanly with a dictionary like so:

file_pairs_table = {}

file_a = "file_a.txt"

file_b = "file_b.txt"

file_pairs_table[(file_a,file_b)] = np.arange(999) #operation resulting in 1d array here.

Then access the value of the file pair like this:

file_pairs_table[(file_a,file_b)]

>>> array([0,1,...,998])

answered Nov 10 at 22:57

Doug7

212

I think you could do this pretty cleanly with a dictionary like so:

file_pairs_table = {}

file_a = "file_a.txt"

file_b = "file_b.txt"

file_pairs_table[(file_a,file_b)] = np.arange(999) #operation resulting in 1d array here.

Then access the value of the file pair like this:

file_pairs_table[(file_a,file_b)]

>>> array([0,1,...,998])

answered Nov 10 at 22:57

Doug7

212

answered Nov 10 at 22:57

Doug7

212

answered Nov 10 at 22:57

Doug7

212

answered Nov 10 at 22:57

Doug7

212

add a comment |

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