- () refers to the container array itself.
- {} refers to the contents of the array.
How to pull value of table for char array?
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Hi there, I am new to tables (using 2019a) and I can't figure this bit out.
I have char arrays in a table:
t(1,'Domain')
ans =
table
Domain
_____________________
{'www.wisebread.com'}
And I want to make a char array using a value from that table to input as a url in a webwrite();
When I use the code
a = 'www.checkthing.com\thingcheck?domain='+t(1,'Domain')+'&secretkey=secretcode'
I get the error
Undefined operator '+' for input arguments of type 'table'.
alternatively if I use strcat I get the error
Inputs must be character vectors, cell arrays of character vectors, or string arrays.
I think this is supposed to be simple but I can't figure out how to use table values in normal operations :(
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采纳的回答
Stephen23
2020-5-21
编辑:Stephen23
2020-5-21
"When I use the code"
t(1,'Domain')
then your indexing returns a table, because parentheses is used to return a table (i.e. usually a sub-table of the table you are indexing into). This is clearly explained in the documentation:
Just like other container classes (e.g. cell array, string array), if you want to access the content of a table you need to use curly braces (not parentheses):
t{1,'Domain'}
"I think this is supposed to be simple..."
It is simple. For container classes table, cell arrays, and string arrays:
If you want part of the cell array, use parentheses. If you want whatever is in the cell array, use curly braces.
更多回答(1 个)
Mehmed Saad
2020-5-21
编辑:Mehmed Saad
2020-5-21
Because t(1,'Domain') is of type table. You need to convert that table output to string or cell. To do that type on Command window
t.Domain(1)
ans =
1×1 cell array
{'www.wisebread.com'}
So basically we extracted the data from table
Now do that strcat step
a = strcat('www.checkthing.com\thingcheck?domain=',t.Domain(1),'&secretkey=secretcode')
另请参阅
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