am trying to cluster my data but matlabs keeps on indicating that Unrecognized table variable name 'sub_metering_1'.

>> 'C:\Users\Vlad\Downloads\household_power_consumption_2007';

>> data = readtable(file_path, 'Delimiter', ';');

X = data{:, {'sub_metering_1', 'sub_metering_2', 'sub_metering_3'}};

Error using {}

Unrecognized table variable name 'sub_metering_1'.

[Voss]

I think that the error message, "Unrecognized table variable name 'sub_metering_1'." means that the table (the variable called "data") doesn't have a variable/column named 'sub_metering_1'.

[Peter]

Thanks but it is already included; these are the variables

DateTime Global_active_power Global_reactive_power Voltage Global_intensity Sub_metering_1 Sub_metering_2 Sub_metering_3

[Voss]

Sub_metering_1 has a capital S; sub_metering_1 has a lower-case s.

Answer 1

[Dyuman Joshi]

Variable names in MATLAB, independently or of a data type, are case sensitive. You need to use the variable name with the proper case as it is defined.

For your case, that would be -

X = data{:, {'Sub_metering_1', 'Sub_metering_2', 'Sub_metering_3'}};