Category: Could not convert from string to float python

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Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm confused by this. When I try this for only one line in interactive section, instead of for loop using script:. Obviously some of your lines don't have valid float data, specifically some line have text id which can't be converted to float.

python – RandomForestClassfier.fit(): ValueError: could not convert string to float-ThrowExceptions

When you try it in interactive prompt you are trying only first line, so best way is to print the line where you are getting this error and you will know the wrong line e. My error was very simple: the text file containing the data had some space so not visible character on the last line. Somewhere in your text file, a line has the word id in it, which can't really be converted to a number. In my case, the font I was using meant that "l" and "1" looked very similar.

I had a string like 'l' which I thought was '' and that messed things up. I solved the similar situation with basic technique using pandas. First load the csv or text file using pandas. It's pretty simple. Then set the index of data to the respected column that needs to be changed. For example, if your data has ID as one attribute or column, then set index to ID. Learn more.

Python Parse String to Float or Int

ValueError: could not convert string to float: id Ask Question. Asked 8 years, 4 months ago. Active 6 months ago. Viewed k times. I'm running the following python script:! Can anyone explain a little bit about this? Thank you. Rodrigo Vargas 10 10 bronze badges. Active Oldest Votes. Anurag Uniyal Anurag Uniyal Zoe 20k 12 12 gold badges 77 77 silver badges bronze badges.

Sopalajo de Arrierez Sopalajo de Arrierez 2, 3 3 gold badges 25 25 silver badges 37 37 bronze badges. This error is pretty verbose: ValueError: could not convert string to float: id Somewhere in your text file, a line has the word id in it, which can't really be converted to a number. Your test code works because the word id isn't present in line 2. If you want to catch that line, try this code. I cleaned your code up a tad:! Blender Blender k 39 39 gold badges silver badges bronze badges.

Perhaps your numbers aren't actually numbers, but letters masquerading as numbers? Tom Roth Tom Roth 8 8 silver badges 18 18 bronze badges. Your data may not be what you expect -- it seems you're expecting, but not getting, floats.

Matt Fenwick Matt Fenwick I am trying to filter my dataset using constant variable method, but it shows me the bellow error. You are trying to use constant variable method for filtering your dataset. But your dataset may contain string as shown in the error. We know constant or quasi-constant method is used to filter out the columns which contains only numeric value. To avoid this error you can use co-relation method to filter out your string data.

Discussing this on a high level, these Clustering is a type of unsupervised learning Your array shapes seem inconsistent. Make the following changes in your script, You can also use the random library's You can simply the built-in function in Hi akhtar, To save your Machine Learning model, you Hi akhtar, To import one pre-created ML model, you Already have an account?

Sign in. ValueError: could not convert string to float in Machine learning. Hi Guys, I am trying to filter my dataset using constant variable method, but it shows me the bellow error.

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Hi akhtar, You are trying to use constant variable method for filtering your dataset.Obviously the real dataset is far more complex than this, but this one reproduces the error.

You have to do some encoding before using fit. As it was told fit does not accept Strings but you solve this. Personally I have post almost the same question on StackOverflow some time ago.

I selected OneHotEncoder that binarize all the strings. It is quite effective but if you have a lot different strings the matrix will grow very quickly and memory will be required. The training input samples.

could not convert from string to float python

Try transforming your data to float and give a try to LabelEncoder. I had a similar issue and found that pandas. Specifically, it splits out columns of categorical data into sets of boolean columns, one new column for each unique value in each input column.

You may use LabelEncoder to transfer from str to continuous numerical values. Then you are able to transfer by OneHotEncoder as you wish. In the Pandas dataframe, I have to encode all the data which are categorized to dtype:object. The following code works for me and I hope this will help you.

As your input is in string you are getting value error message use countvectorizer it will convert data set in to sparse matrix and train your ml algorithm you will get the result. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Skip to content Exception or error:. There are several classes that can be used : LabelEncoder : turn your string into incremental value OneHotEncoder : use One-of-K algorithm to transform your String into integer Personally I have post almost the same question on StackOverflow some time ago.

You may not pass str to fit this kind of classifier.

could not convert from string to float python

More exceptions or solve method. Leave a Reply Cancel reply Your email address will not be published.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have some values is csv file and In csv file some values are numeric and some are string number.

Example of csv file:. The problem is that your string is not just ' It also contains speech marks ". This means that before you convert this to a float, you need to remove the leading and trailing speech marks. Luckily, Python has a very handy string method. In this case, you want to strip row[1] of the leading and trailing " characters. You can do this very easily:.

It is obvious that the double quotes cause the problem, Python can only convert a string of numbers and the decimal symbol to a float. One way to remove the double-quotes are using a regular expression. This allows you to run the same code, regardless whether the input has the double-quotes or not:. It returns a list of length three, of which the second item contains the number. This can then be converted to a float. The second field in your csv is quoted with ". In csv, having quoted fields does not mean those are strings, but that the field could contain a delimiter, like ",45".

Removing the quotes afterwards not only adds extra work, but can also lead to errors if the field contains a delimiter. For example ",45" would return " and 45" as two different fields.

could not convert from string to float python

Learn more. Asked 2 years, 3 months ago. Active 2 years, 3 months ago. Viewed 22k times. Example of csv file: 1," ValueError: could not convert string to float: '" You are trying to convert a string into float. Try to remove " " from " Notice the double quotes in the error messageBy using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. EDIT: I used strip as well as rstrip as suggested in some of the answers to remove whitespaces, but still the error does not go away:.

The error is due to your line parsing. You are separating on spaces, not commas, which is what should happen according to your screenshot. The key is looking at the error returned. It is trying to convert the entire line from a string into a float. If the commas are troubling you, you might want to. Learn more. Why is Python showing 'ValueError: could not convert string to float'?

Ask Question. Asked 2 years, 9 months ago. Active 2 years, 9 months ago. Viewed 14k times. I have a CSV containing numbers which I am trying to convert to floats. Traceback most recent call last : File "hierarchical-clustering. EDIT: I used strip as well as rstrip as suggested in some of the answers to remove whitespaces, but still the error does not go away: Traceback most recent call last : File "hierarchical-clustering.

Kristada Kristada 2, 1 1 gold badge 17 17 silver badges 37 37 bronze badges. I don't think float cares about newlines. I just tried float "1. I think the problem is your commas. Have you considered using the csv module to read your csv file? If you use that instead of trying to parse the file manually, IIRC it will perform rudimentary type conversion on your behalf.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. As you can see, the program asks for how many miles you can walk and gives you a response depending on what you type in.

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The problem is exactly what the Traceback log says: Could not convert string to float. It can't convert arbitrary alphanumeric strings, notably including 'How am I supposed to know? Learn more. Confusing python - Cannot convert string to float Ask Question. Asked 6 years, 5 months ago.

Active 2 months ago. Viewed 63k times. I got a value error and even if I try playing around with the code, it doesn't work! How can I get it right? Here is the code: As you can see, the program asks for how many miles you can walk and gives you a response depending on what you type in.

This is the code in text format: print "Welcome to Healthometer, powered by Python Go and walk miles now! Keep it up! Try doing 10 miles" else: print "Please type in a number! Try doing 10 miles". Turbo Turbo 2 2 gold badges 4 4 silver badges 15 15 bronze badges.

Why has it been voted down four times?Please read the Help Documents before posting. Hello There, Guest! Login Register. Login Username: Password: Lost Password? Remember me. Thread Rating: 0 Vote s - 0 Average 1 2 3 4 5. Thread Modes. BoaCoder3 Programmer named Tim. In this programme i'm trying to solve a mathematical ratio problem, then calculate the squareroot, however, whenever i try to give it input like this: 2. Windspar Minister of Silly Walks. Python does recognize '.

You need to print ratio. To see your error. View a Printable Version Subscribe to this thread. Default Dark Midnight. Linear Mode. Threaded Mode. Lost Password? BoaCoder3 Programmer named Tim Posts: 9 Threads: 6 Joined: Nov Reputation: 0 Likes received: 0 1 Jan, PM In this programme i'm trying to solve a mathematical ratio problem, then calculate the squareroot, however, whenever i try to give it input like this: 2. Edited 1 time in total. How do I convert this string back to a list of integers?

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String to float conversion with python

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