How to read a csv file and convert it into a sparse matrix
up vote
-1
down vote
favorite
I have a csv file like the following enter image description here. I want to make a sparse 0 1 matrix according to the value in rows, the number of columns of the matrix is determined by the largest value in the table. For example, the largest value in the table is 2402. So I want to have a matrix of size 11 * 2402. The first row of the matrix should have 1 at the 1084, 1097, 1126, 2183, 2375 th column, and 0 at other columns. And I want to use this sparse matrix to do addition and multiplication later. Is there any way to read the file and store the matrix efficiently?
python csv matrix
asked Nov 20 at 4:28
luw
1
add a comment |
up vote
-1
down vote
favorite
I have a csv file like the following enter image description here. I want to make a sparse 0 1 matrix according to the value in rows, the number of columns of the matrix is determined by the largest value in the table. For example, the largest value in the table is 2402. So I want to have a matrix of size 11 * 2402. The first row of the matrix should have 1 at the 1084, 1097, 1126, 2183, 2375 th column, and 0 at other columns. And I want to use this sparse matrix to do addition and multiplication later. Is there any way to read the file and store the matrix efficiently?
python csv matrix
asked Nov 20 at 4:28
luw
1
1
Welcome to StackOverflow! What exactly did you try, and what was the result? Please go through the guide on How to ask a good question? so that others may be able to provide you with better assistance.
– Uzair A.
Nov 20 at 4:49
What libraries are you familiar with? or at least have installed? numpy?, pandas? scipy sparse?
– hpaulj
Nov 20 at 5:19
I know some basic operations of numpy and pandas. I used pandas to read the file as the image shown, but I don't know how to align the values and make it into a matrix.
– luw
Nov 20 at 5:32
add a comment |
up vote
-1
down vote
favorite
up vote
-1
down vote
favorite
I have a csv file like the following enter image description here. I want to make a sparse 0 1 matrix according to the value in rows, the number of columns of the matrix is determined by the largest value in the table. For example, the largest value in the table is 2402. So I want to have a matrix of size 11 * 2402. The first row of the matrix should have 1 at the 1084, 1097, 1126, 2183, 2375 th column, and 0 at other columns. And I want to use this sparse matrix to do addition and multiplication later. Is there any way to read the file and store the matrix efficiently?
python csv matrix
asked Nov 20 at 4:28
luw
1
I have a csv file like the following enter image description here. I want to make a sparse 0 1 matrix according to the value in rows, the number of columns of the matrix is determined by the largest value in the table. For example, the largest value in the table is 2402. So I want to have a matrix of size 11 * 2402. The first row of the matrix should have 1 at the 1084, 1097, 1126, 2183, 2375 th column, and 0 at other columns. And I want to use this sparse matrix to do addition and multiplication later. Is there any way to read the file and store the matrix efficiently?
python csv matrix
python csv matrix
asked Nov 20 at 4:28
luw
1
asked Nov 20 at 4:28
luw
1
asked Nov 20 at 4:28
luw
1
asked Nov 20 at 4:28
luw
1
asked Nov 20 at 4:28
luw
1
1
1
Welcome to StackOverflow! What exactly did you try, and what was the result? Please go through the guide on How to ask a good question? so that others may be able to provide you with better assistance.
– Uzair A.
Nov 20 at 4:49
What libraries are you familiar with? or at least have installed? numpy?, pandas? scipy sparse?
– hpaulj
Nov 20 at 5:19
I know some basic operations of numpy and pandas. I used pandas to read the file as the image shown, but I don't know how to align the values and make it into a matrix.
– luw
Nov 20 at 5:32
add a comment |
1
Welcome to StackOverflow! What exactly did you try, and what was the result? Please go through the guide on How to ask a good question? so that others may be able to provide you with better assistance.
– Uzair A.
Nov 20 at 4:49
What libraries are you familiar with? or at least have installed? numpy?, pandas? scipy sparse?
– hpaulj
Nov 20 at 5:19
I know some basic operations of numpy and pandas. I used pandas to read the file as the image shown, but I don't know how to align the values and make it into a matrix.
– luw
Nov 20 at 5:32
1
1
Welcome to StackOverflow! What exactly did you try, and what was the result? Please go through the guide on How to ask a good question? so that others may be able to provide you with better assistance.
– Uzair A.
Nov 20 at 4:49
Welcome to StackOverflow! What exactly did you try, and what was the result? Please go through the guide on How to ask a good question? so that others may be able to provide you with better assistance.
– Uzair A.
Nov 20 at 4:49
What libraries are you familiar with? or at least have installed? numpy?, pandas? scipy sparse?
– hpaulj
Nov 20 at 5:19
What libraries are you familiar with? or at least have installed? numpy?, pandas? scipy sparse?
– hpaulj
Nov 20 at 5:19
I know some basic operations of numpy and pandas. I used pandas to read the file as the image shown, but I don't know how to align the values and make it into a matrix.
– luw
Nov 20 at 5:32
I know some basic operations of numpy and pandas. I used pandas to read the file as the image shown, but I don't know how to align the values and make it into a matrix.
– luw
Nov 20 at 5:32
add a comment |
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53386243%2fhow-to-read-a-csv-file-and-convert-it-into-a-sparse-matrix%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53386243%2fhow-to-read-a-csv-file-and-convert-it-into-a-sparse-matrix%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
Welcome to StackOverflow! What exactly did you try, and what was the result? Please go through the guide on How to ask a good question? so that others may be able to provide you with better assistance.
– Uzair A.
Nov 20 at 4:49
What libraries are you familiar with? or at least have installed? numpy?, pandas? scipy sparse?
– hpaulj
Nov 20 at 5:19
I know some basic operations of numpy and pandas. I used pandas to read the file as the image shown, but I don't know how to align the values and make it into a matrix.
– luw
Nov 20 at 5:32