Table 替换不同类型数据时字段数字发生变化

Question

基于此post（），我运行脚本上了table。在脚本中，我提取了一列，运行上的函数，并用相同但复制的 table（原始）的新列替换旧列。奇怪的是，我发现修改后的列数据没有正确存储在新的 table 中。为什么？我怀疑这是因为分类。我该如何解决？

代码：

clc;
clear all;
 
dataInput = webread('https://people.sc.fsu.edu/~jburkardt/data/csv/hw_25000.csv');
tempCol =  (f(table2array(dataInput(:,2))));
 
newDataInput = dataInput;
newDataInput(:,2) = table(tempCol); 
   
function FivDigsStr = f(x)
%formatting to character array with 5 significant digits and then splitting. 
%at each tab. categorical is needed to remove ' 's that appear around char 
%in the output PDF file with newer MATLAB versions
%e.g. with R2018a, there are no ' ' in the output file but ' ' appears with R2020a
FivDigsStr = categorical(split(sprintf('%0.5G\t',x)));
%Removing the last (<undefined>) value (which is included due to \t)
FivDigsStr = FivDigsStr(1:end-1);
end

Answer 1

您不能将一种类型的值替换为另一种类型的值。相反，只需重写该列。即使用：

newDataInput.(newDataInput.Properties.VariableNames{2}) = tempCol;

而不是：

newDataInput(:,2) = table(tempCol);

Table 替换不同类型数据时字段数字发生变化

Table fields digit change when replacing data of different types

matlab

matlab-table