ECG, difference between original data and imported data of original data into Matlab

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SYARIFUDDIN BAGINDA ALI
编辑： Star Strider 2015-10-7
Hi I need some help in importing data from Physionet into Matlab.
For instance,
the data I copied into excel are the following:
Time(s) |Volt(s)
0.00000 8.46
0.00004 8.592
0.00008 8.352
0.00012 8.152
0.00016 8.34
hence in Excel, the data is presented in 2 columns, 6 rows. When I type in importdata Excelfile.xlsx into Matlab (Excelfile refers to the file containing the above information), the following data then appears,
Trial>> importdata 'Book2.xlsx'
ans =
0 8.4600
0.0000 8.5920
0.0001 8.3520
0.0001 8.1520
0.0002 8.3400
0.0002 8.5280
0.0002 8.3120
how come there is a difference between that of column 1 in the original data and that of the imported data in Matlab?
Please help me anyone. I've been figuring this out for days, nearing to a week.
My email is as follows: syarifozil91@gmail.com

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采纳的回答

Thorsten
Thorsten 2015-10-7
编辑：Thorsten 2015-10-7
The default format do display numbers in Matlab is short, i.e., "Scaled fixed point format with 5 digits.". If you want to see more digits (15 for double), use
format long
So your numbers are read correctly, they are just displayed by default with too few digits.

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