Questions tagged [csv]

Comma-Separated Values are a list of plain text values delimited by commas, or a file containing one or more lists in that format.

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7 views

Is high school GPA included in IPEDs NCES databases?

I’m currently developing a computer tool which will sort through the US college and university NCES data provided in the IPEDs website to match users with potential universities. NCES shows university ...
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1answer
22 views

How to specify different columns stacked vertically within CSV using pandas?

I have a CSV file that looks like below with columns labeled below data, and I'm have trouble trying to retrieve said data with pandas. I'm only able to address the columns at the top with the ...
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1answer
605 views

Whole time column in csv file convert into UTC (epoch) using python

I have a datset with time and column. I want to plot a graph with time and value. I tried many methods but didn't come proper graph. Because I have a time series. Then I thought I will convert time ...
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2answers
468 views

Getting some data from a csv file into a list of tuples using Python

I have a csv file of almost 2 million rows and about 20 columns. I am interested in about 40000 of these rows, and in 5 of the columns 'squat', 'bench', 'deadlift', 'bodyweight', 'total'. I'd like to ...
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1answer
132 views

How do I get Multiple CSV files (csv file names will be column names) from a folder to a pandas dataframe?

I think the title is enough for what is my problem here. I have 100 tickers in a folder. I got all csv files to one list. but I wanna see the tickers name which these are csv file names. what should ...
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1answer
114 views

Extract or subset hundreds of columns from a data frame

I need to extract many columns from a dataset. I have a very large csv file with thousands of columns and rows, and I read it into R using: ...
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1answer
5k views

File converter: from CSV to HDF5

Can anyone recommend any command line tool for converting large CSV file into HDF5 format?
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2answers
2k views

How to create a parquet file from a query to a mysql table

Updating a legacy ~ETL; on it's base it exports some tables of the prod DB to s3, the export contains a query. The export process generates a csv file using the following logic: ...
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1answer
79 views

How do you see the element of a csv table with many columns (>30) which the names of its columns is more than 10 character in pandas?

How do you see in pandas the element of a csv table with many columns (>25) which the names of its columns is more than 10 character? I have 5000 rows and 32 columns and the label of some columns ...
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1answer
194 views

alternatives to pyspark to query a csv file locally (no distributed computation needed)

I am reading a csv file with pyspark to extract some information from it. I am running pyspark locally and I do not need distributed computation. On the contrary I need some plotting library such as ...
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2answers
18k views

Merging large CSV files in pandas

I have two CSV files (each of the file size is in GBs) which I am trying to merge, but every time I do that, my computer hangs. Is there no way to merge them in chunks in pandas itself?
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1answer
12k views

how to transform a folder of images into csv file?

I have a data set for segmentation project. The dataset have 2 folders containing train folder and annotated_train_data folder, both folders have images. input and label both are images. I want to ...
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2answers
109 views

Pandas loads a csv file incorrectly, but without throwing an error [closed]

So I tried loading some data through pandas to practice manipulating it, but I ran into a slight problem. Basically, the pandas loads the data improperly. And it does so consistently. Let me show you ...
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45k views

How to store strings in CSV with new line characters?

My question is: what are ways I can store strings in a CSV that contain newline characters (i.e. \n), where each data point is in one line? Sample data This is a ...
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0answers
108 views

Unexpected arguments error appearing on the command line when running mapreduce job (MRjob) using python

I am fairly new to this process. I am trying to run a simple map-reduce job using python 3.8 with a csv on a local Hadoop cluster (Hadoop version 3.2.1). I am currently running it on Windows 10 (64-...
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1answer
519 views

R: reading big data files in R

In R, there are libraries which help speed up the process of reading huge data files. Examples of these libraries include sqldf and ff. What would be the disadvantage of using these packages to read ...
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1answer
25 views

How to filter in pandas based on string value? [closed]

I want to filter a pandas dataframe based on the id of the row. The id is a sequence of patient names. For example, I have columns in this format: ID | A | B And ...
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1answer
5k views

Pandas throwing “Error tokenizing data. C error” while loading data sets from URL

I am trying to work on the Titanic competition to get hands on experience with data science & machine learning. I tried to load up the datasets from GitHub but pandas threw the following error: <...
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3answers
229 views

How to get K most different rows in csv?

We have boring CSV with 10000 rows of ages (float), titles (enum/int), scores (float). How to select 1000 most different rows? I look for a general solution that ...
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1answer
37 views

Recommendations for Data Visualization solution for large CSV file on a non-profit website

I would like your advice and recommendations for a non-profit that is trying to turn a large CSV file into meaningful information. I am part of a non-profit that would like to turn a 23,000 row x 23 ...
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1answer
19 views

Scrapping data from a CSV file [closed]

So, I'm a rookie at web scrapping and Python in general, and I'm having quite a hard time learning it. I'm trying to get some data from a csv file, but so far I could only split lines and columns. I ...
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4answers
71 views

How to view entire 5788 rows and 7 columns.?

I want to see entire 5788 rows and 7 columns of my CSV data. I used below code and it is giving little data by stating [5788 rows x 7 columns] but showing only 10 rows and 5 columns in python prompt. ...
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1answer
33 views

CSVs: how to output missing data to make processing easier?

If supplying data (that can be either string or numeric) via CSVs, what's a good strategy for marking that a value is missing? Some non-empty sentinel, like NA ...
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0answers
19 views

What's the best way to store and then call 3 Million+ records for training?

Good afternoon all, I am working on a Deep Learning project where I'm proceeding in batches (rather than a continuous pipeline). Essentially I've built a function that can convert raw data into ...
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28 views

Parse JSON to CSV using Python

I have a request that is giving me a JSON answer: ...
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1answer
66 views

How do I change the location of Google BigQuery

So, I'm trying to use Google BigQuery for the first time for a project of mine, and I'm a bit confused. The documentation isn't helping much, and it looks like all the Google employees are gone thanks ...
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2answers
38 views

I am working on a pose dataset and want to convert this data into CSV format. How to convert this data into a single row of data

This is the data for one pose. I have a lot of data like this which i want to convert to CSV to apply machine learning algorithm. I am assuming I have to convert this data into a single row of comma ...
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245 views

Dask error when reading data from a large zip file

I have a .zip folder with a lot of .csv files which I read into a Dask DataFrame like this: ...
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1answer
38 views

Representing 2 dimensional data for facial recognition

My goal is to train a neural network to recognize faces based on a list of landmark points generated by Google Firebase ML-Kit. Since I just started familiarizing myself with ML, I only want my model ...
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1answer
150 views

How to split a CSV into a dataframe without newline

Currently I'm using pyspark to make my df from a csv. However when I take the data in, it puts each element on a new line. Is there any way to keep the elements separate, and keep them on the same ...
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2answers
99k views

ValueError: could not convert string to float: '���'

I have a (2M, 23) dimensional numpy array X. It has a dtype of <U26, i.e. unicode string ...
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1answer
987 views

Any one read the over 100gb csv file and successfully concatenation?

I have been searching for the deal with large CSV file read method Its over 100gb and need to know how deal with the chunk file processing and make concatenation faster ...
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0answers
15 views

Built strong base for Unsupervised Learning [closed]

I’m am new into machine learning, recently I have put a task upon my shoulders to Detect Outliers in Dataset. The anomaly detection should be done using Unsupervised learning and preferably use ...
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2answers
340 views

Should I use MongoDB instead of storing data in CSV in python?

I am currently storing data crawled from multiple websites having same but still different structure so every crawler is saving data in separate csv. I am planning to store the data using MongoDB ...
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1answer
13k views

How to save API data into CSV format?

Is there an easy way to convert API data with python commands and output the results in CSV format? Here's what I'm doing now: ...
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1answer
35 views

Deep learning model gives random results

First I am new to machine learning if it is an obvious question, I am sorry. ...
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6answers
201k views

I got the following error : 'DataFrame' object has no attribute 'data'

I am trying to get the 'data' and the 'target' of the iris setosa database, but I can't. For example, when I load the iris setosa directly from sklearn datasets I get a good result: Program: ...
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1answer
205 views

How can I override the values of 1 column in a big dataframe using a small second dataframe? [closed]

I have a Pandas dataframe (donations_df) that contains thousands of donations. Each donation row has many columns, but the two key ones for my question are: A <...
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1answer
8k views

np.loadtxt function showing error, could not convert string to float: '“Date”'

This is my stock market csv data: ...
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1answer
3k views
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2answers
82 views

File format where column names are repeated on each row

I have received a dataset in text file with the following format ...
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1answer
3k views

Getting stock data in a discipline manner from Yahoo finance

I used the below code for downloading stock data from yahoo finance:- ...
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2answers
40 views

Removing # from header

I have a $(418,2)$ matrix and I want to convert it to csv. so I write: np.savetxt('titanic1.csv', Sol, fmt='%.2f', delimiter=",",header="PassengerId,Survived") ...
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1answer
178 views

Processing csv file with more than 700K rows of data

I have a .csv file (around 400MB in size) which contains 700K rows of structured data. Table structure is: ...
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2answers
622 views

How to calculate occurance of a name per hour basis of monthly csv data using python

I have csv file which have DateTime and application OS name. DateTime have for 1 month ,per hour basis. The csv looks as follows, ...
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1answer
372 views

Data scraping & NLP?

I'm scraping data from Bing search results for (non-commercial purposes, of course) on Python using BeautifulSoup. I've entered an Indian dessert name, called 'rasmalai' as the word that I am focusing ...
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3answers
868 views

What is a good way to store processed CSV data to train model in Python?

I have about 100MB of CSV data that is cleaned and used for training in Keras stored as Panda DataFrame. What is a good (simple) way of saving it for fast reads? I don't need to query or load part of ...
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1answer
2k views

day is out of range for month import from csv file in python

Here I have one csv file with different values and date_time. I wrote the code and run it. Then it gave me an error time data '8/6/2018 6:45' does not match format ' %d/%m/%Y %H:%M:%S' I want to plot ...