Could not convert string to float label. I have also...
- Could not convert string to float label. I have also included a line for converting the string elements to float I get the error as shown above. For example, letters or symbols in the string cause this error. Nov 20, 2020 · This means label (at this exact moment) is of type string whereas it should be reported to be <class 'sklearn. In summary, the key to solving the Python ValueError: could not convert string to float: is to understand where and why it’s being raised. plot([1,2,3], [-50, 50, 100]) # Divide y tick labels by 10 ax. This kind of error ValueError: could not convert string to float: can occur when reading a dataframe from a csv file with types as df = df[['p']]. In Python, we can only convert specific string values to float. AssertionError: train: No labels in /content/datasets/roboflow/train/labels. LabelEncoder'> following label = LabelEncoder()! When fit'ing labels that way, you get integers already, not strings: no conversion whatsoever needed: Jul 23, 2025 · What is "Cannot Convert String To Float" In Python? The "Cannot Convert String to Float" error in Python typically occurs when attempting to convert a string to a float data type, but the string content is not a valid numeric representation. I have looked at other posts and the suggestions are to convert to float which I have done. to_numeric () pandas. 6. ValueError: could not convert string to float:‘xx’ 解决方法记录 1. See here for an example on using OrdinalEncoder to convert strings to integers. _label. Another instance of a ValueError occurs when you attempt to convert a string into an integer or a float using constructors. 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. In addition, I Suppose you have string column,float column,int column in your dataframe. astype({'p': float}). So, I use mutual_info_classif in my codes but I get this error: could not convert string to float Because of one of my feature (Name=Grade) that is categorical and the unique value of this feature is :A,B,C,D. _year) < 2010 else False │ └ 'orange' └ <yolox. Label binarizer will skip the two step process (converting string to integer and then integer to float) as mentioned by DontDivideByZero. corr () we can use only float column but int columns too (if first we convert them from int to float) What is "Cannot Convert String To Float" In Python? The "Cannot Convert String to Float" error in Python typically occurs when attempting to convert a string to a float data type, but the string content is not a valid numeric representation. reader(open(filenam I get a value error of ValueError: could not convert string to float when I run my code below. I have a data set of one dependent categorical and 7 categorical features with 12987 samples I tried one hot encoding and it worked by it is not dealing with these large categories. (optional) I have confirmed this bug exists on the master branch of s. ValueError: could not convert string to float: 'what' The error refers to that str () cannot be passed to the fit () method. 我正在按照本教程编写一个朴素贝叶斯分类器：我一直收到这个错误：dataset[i] = [float(x) for x in dataset[i]]ValueError: could not convert string to float: 下面是我的代码中出现错误的部分：def loadDatasetNB(filename): lines = csv. 0 # Find all digits, decimal Dec 29, 2025 · This will also solve the “ could not convert string to float Jupyter ” error if you are working in a Jupyter notebook and you need to extract a floating-point number from a similar string. Now I am trying to parse this string into a function which splits each of the lines of text and convert into a LabeledPoint. For any kind of Machine Learning task or a NLP task (which is what you are doing), you need to convert string/text values to numeric values. I have confirmed this bug exists on the latest version of scanpy. corr results in ValueError: could not convert string to float Asked 2 years, 7 months ago Modified 2 years, 2 months ago Viewed 31k times The pandas ValueError occurs when you use the float() function to convert a string to a float, but the string contains characters that cannot be interpreted as a float. train: WARNING ⚠️ 0. 00" at position 0 We will see similar result if we try to convert the column to numerical by method pd. The pandas ValueError occurs when you use the float() function to convert a string to a float, but the string contains characters that cannot be interpreted as a float. I think normally folders train/test/validation should contains a "images" and a "labels" (I got from roboflow subfolders with "labelTxt" name), so I created renaming from "labelTxt" to "labels" (see second notebook link). If the csv was recorded with empty spaces, python will not recognize the space character as a nan. 3 ソースコード sokudo = int((float SimpleImputer strategy "most_frequent" returning ValueError: could not convert string to float when imputing strings #19572 New issue Closed #22063 【Python】成功解决ValueError: could not convert string to float: ‘ignoring input’ 🌈 欢迎莅临我的个人主页👈这里是我深耕Python编程、机器学习和自然语言处理（NLP）领域，并乐于分享知识与经验的小天地！🎇 🎓 博主简介： 我是云天徽上，一名对技术充满热情的探索者。多年的Python编程和机器学习实践 I have checked that this issue has not already been reported. ValueError: could not convert string to float - sns. subplots() ax. This common issue arises from data preprocessing problems. The machine cannot uderstand or work with string values. Network () directly in the future as follows: ntwk = rf. What is "Cannot Convert String To Float" In Python? The "Cannot Convert String to Float" error in Python typically occurs when attempting to convert a string to a float data type, but the string content is not a valid numeric representation. When you encounter the ValueError: could not convert string to float error in decision trees, it means the model is trying to process text data, which it can't. cache. Step 2: ValueError: Unable to parse string "$10. jpg: ignoring corrupt image/label: could not convert string to float: ‘head‘ . to_numeric) that sets invalid values to NaN and converts the rest to float. The Python ValueError: could not convert string to float occurs when we pass a string that cannot be converted to a float to the `float()` class. By understanding these common issues and their solutions, you can effectively convert strings to floats in Python and avoid potential pitfalls. use_07_metric = True if float (self. csv文件中的列时，读取进来的值是string类型，尝试用循环把list里面的字符串转换为float的时候出现了这个问题： 大概是说：数值错误：无法把字符串转换为浮点数 查阅了网上其他朋友的 The Python ValueError: could not convert string to float occurs when you pass a string that can’t be converted into a float to the float() function. Learn how to resolve the ValueError: could not convert string to float error in your Python machine learning models. #from timestamp to visual form try: row [0]=datetime. Since it’s impractical to convert a string or any other data type other than an integer into a float type, the Python interpreter raises an exception. Python generates an error: 'could not convert string to float: 'run1'', where 'run1' is an ordinary (non-missing) value from the first column with categorical data. Can not train without labels. 前提・実現したいこと could not convert string to floatが出て直し方が分かりません 発生している問題・エラーメッセージ エラーメッセージ sokudo = int((float(csv[7]) * 1. to_numeric () is a function in Pandas which is used to convert argument to a numeric type. It’s either because the string being converted to a float is not actually numerical, OR it could be raised when the string is not correctly formatted as a float. To resolve this error, you need to remove all elements that are non-compatible with float type like special characters and letters from the string. preprocessing. 852)*10) ValueError: could not convert string to float: 該当のソースコード pthon3. py file I got following error Currently in I've implemented a fix so that you should be able to pass an encoded string-type file to rf. Network(open("probe. All columns of the dataframe are float and the output y is also float. How to use the LabelEncoder in this case so that the above code works? To fix ValueError could not convert string to float make sure that the string you are trying to convert to float is a valid numerical value. 文章浏览阅读3w次，点赞8次，收藏21次。在使用numpy加载Excel数据时遇到ValueError，可能是格式问题或字符串无法转为浮点数。建议检查Excel格式或使用pandas读取，通过引入库和读入数据步骤来解决。 The column "sellerId" is a string and linearReg or any kind of ML accepts only integer/float variable (they don't understand string variable). so you should transform the "sellerId" column before feeding the data to your ML model. to_numeric(: When you encounter the ValueError: could not convert string to float error in decision trees, it means the model is trying to process text data, which it can't. Otherwise, you will get ValueError: could not convert string to float: Iris-setosa or something similar. Search before asking I have searched the YOLOv5 issues and discussions and found no similar questions. For the labels, I think you need to add dtype=np. VOCDetection object at 0x7f7214862790> ValueError: could not convert string to float: 'orange' 再训练一半的时候 出现了这个问题 我把int改成了float 结果就出现了不能转换 这个问题怎么解决呢 求大佬解答 1 You could just use a LabelBinarizer. data. Apr 24, 2025 · This method works well for strings containing currency symbols, commas, or other formatting characters. get_t "ValueError: could not convert string to float" while using OneHotEncoder for machine learning Asked 6 years, 10 months ago Modified 5 years, 10 months ago Viewed 10k times Another instance of a ValueError occurs when you attempt to convert a string into an integer or a float using constructors. 4w次，点赞14次，收藏49次。本文介绍了一种解决非数值型数据无法直接用于机器学习的问题的方法——One-hot编码，并通过实例展示了如何使用pandas库中的get_dummies函数实现这一过程。文章还对比了编码前后数据的变化，强调了数据预处理的重要性。 For any kind of Machine Learning task or a NLP task (which is what you are doing), you need to convert string/text values to numeric values. I'm not sure what's the reason for it since OneHotEncoder shouldn't have any problem converting string to float for categorical variables We could then convert this string to a float using the float() function. voc. str to make it work. Method 2: Using pandas. Question when I train the model, I put the label info in the txt file as usual , but happened I am doing vehicle registration plate detection using YOLOv4 in colab. When I ran !python \\convert_annotations. Here, we are converting the string column to float using to_numeric () function. We are printing the data type of the columns before and after the conversion of column to understand the conversion. One way to remove the double-quotes are using a regular expression. If you just want to convert this "problematic" array into a numpy float array and handle the invalid values later, then pandas package has a function (pandas. fromtimestamp (float (row [0])). set_yticklabels([int(float(label. s2p", encoding='utf-8-sig')) You still need to encode your strings, otherwise you will get "could not convert string to float" error. As explained in the answer, ValueError: could not convert string to float can occur when reading a dataframe from a csv file and casting types df = df[['p']]. If we try to convert an invalid string to a float, we will raise the ValueError: could not convert string to float. Nov 13, 2025 · The could not convert string to float error in Python is a common issue that arises when trying to convert a string that does not represent a valid floating-point number. 文章浏览阅读2. 二、could not convert string to float报错： 在上述方法处理好后运行程序，词嵌入完成了，在训练第一个epoch的时候，有数据读不进去，报could not convert string to float错误。 我上网查了资料，无非一个方法：检查数据里面是否有非法字符，也就是\n,\t。 I was trying to run code to modify the y ticks of a matplotlib plot: fig, ax = plt. To solve this error, ensure you strip the string of invalid characters like commas, spaces or brackets before passing it to the float () function. The ValueError: could not convert string to float error in Python is a common issue when attempting to convert a string to a floating-point number using the float May 19, 2025 · What Causes the Error? The error occurs when float () tries to convert a string that isn't a valid number. But I would like to know the best practice on how strings are handled in decision tree problems. isoformat () array. how to solve this string formatting error for ' '? I realize that some characters are not read properly in the dataframe, and the unicode replacement character is just a result of it. datasets. 10 I am trying to use a LinearRegression from sklearn and I am getting a 'Could not convert a string to float'. append (row) except ValueError: array. tsplot, time - using strings to label x axis Asked 7 years, 8 months ago Modified 7 years, 8 months ago Viewed 5k times ValueError: could not convert string to float: 'female' #705 Closed dhwprnjs827 opened on Apr 15, 2020 How do I handle such a scenario? I can convert a string to numbers by some mechanism such as hashing in Python. 问题描述 读取. Check out How to Convert a String to a Float in Python? Method 2: Use Regular Expressions for More Control For more complex patterns, regular expressions in Python provide better control: import re def convert_to_float(string_value): if not string_value: return 0. For tips. append (row) This kind of error ValueError: could not convert string to float: can occur when reading a dataframe from a csv file with types as df = df[['p']]. olgo, 1hcj3, mrlm, zqooj, blj1b, mfomnh, sdlvd, 14xtzi, hufjl, ervp,