今天在用pandas中str.contains函数对excel中的数据进行清洗的时候, df = df.loc[df["列名"].str.contains("需要筛选的字符串"),:] 出现了一个报错: ValueError: Cannot mask with non-boolean array containing NA / NaN values 后来发现是因为这列中既有字符串,还有浮点类型的数据,所以出现了错误! 开始我还...
In this regard, this hierarchical structure of the Bouligand array, containing both soft and strong fiber constituent blocks, was very advantageous for good elastic recovery and energy loss under compressive loading39,40,41,42. Surprisingly, a sequence of real-time photograph captured by a camera ...
need to convert the values of an array for display purposes. To display values to a user, you take the value and embed it inside an HTML element. This is a perfect job formap. Withmap, you can create a new array that consists of HTML containing individual values in the array for ...
Create a subarray containing the above linear and rectangular arrays with changes in amplitude taper and phase shift values. subArr = conformalArray(Element={la ra dipole},ElementPosition=[0 0 1.5; 0 0 0; 1 1 1],...AmplitudeTaper=[3 0.3 0.03],PhaseShift=[90 180 120]); show(subArr)...
Creates a new instance of a collection containing the elements of a sequence. init<S>(S) Creates an array containing the elements of a sequence. init(repeating: Element, count: Int) Creates a new array containing the specified number of a single, repeated value. init(unsafeUninitializedCapacity...
Returns a new array containing the mapped values from iterable, in order, as defined by given mapper function. Equivalent to array.map and Array.from:d3.map(new Set([0, 2, 3, 4]), x => x & 1) // [0, 0, 1, 0]# d3.reduce(iterable, reducer[, initialValue]) · Source...
解决:ValueError: Cannot mask with non-boolean array containing NA / NaN values 错误原因:这里就是说,分组这一列里面,包含了非字符串的内容,比如数字。因为 .str.contains 的使用就要求这个字段必须是字符串,不能掺杂数字的。 解决方案: #包含对应关系的所有行data_ych_pid = self.database[self.database[...
Examples #include "MatlabDataArray.hpp" int main() { matlab::data::ArrayFactory factory; // Create a vector containing two scalar values std::vector<matlab::data::Array> args({ factory.createScalar<int16_t>(100), factory.createScalar<int16_t>(60)}); return 0; } ...
a = np.array(...): Create a NumPy array 'a' containing integer values. b = np.array(...): Create a NumPy array 'b' containing string values. The arrays 'a' and 'b' have the same length. (100 < a): This part creates a boolean array with the same shape as 'a', where eac...
38.Write a Java program to get the majority element from an array of integers containing duplicates. Majority element: A majority element is an element that appears more than n/2 times where n is the array size. Click me to see the solution ...