How do I define an empty table of unknown size?
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Fabrice Lambert
le 26 Mai 2020
Modifié(e) : Fabrice Lambert
le 26 Mai 2020
Hi,
I want to define an empty table to fill in a for loop. The size of the table is defined by another variable. How do I define the "VariableType" variable without knowing how many variables there are? In my case they will all be strings. Example:
T = table('Size', [2, numel(Elements)], 'VariableType',["string","string","string","string","string"]);
In this particular cae, numel(Elements) would be 5. But how do I define the table if I don't know numel(Elements) ?
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Steven Lord
le 26 Mai 2020
Elements = 1:5;
n = numel(Elements);
T = table('Size', [2 n], 'VariableTypes', repmat("string", 1, n))
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Walter Roberson
le 26 Mai 2020
Sorry, variables that do not exist do not have any datatype.
As you add variables to the table, the datatype associated with the variable will be the determined by the datatype of the value being assigned. If necessary, string() the value you are assigning into the table.
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Walter Roberson
le 26 Mai 2020
That is not an empty table with an unknown number of variables: that is a table with 2 rows and a known number of variables.
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