Data input

I am trying to input data from text files from 4 seperate columns. The preview in the import wizard matches the text file however when I input each column (using the command A = data(;,1) etc.)the numbers imputed are completely wrong. This way of inputing data as previously worked without any problems, so I don't know I have changed settings without realising?

[Walter Roberson]

Please show us an example of the first few lines of the file, and tell us more about what values you are getting in place of what you expect.