table less than operator
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hi,
I'm having this error : Undefined operator '<' for input arguments of type 'table'.
how can I write the operator less than for table?
I ttied using gt(A,B) and lt(A,B) but it still give me this error.
I still want to use table and not to convert the table to array.
thanks!
2 个评论
Walter Roberson
2020-1-17
What does it mean to you for a table to be less than something? Are you sure you do not instead want to compare the content of a variable in the table to something?
sani
2020-1-17
回答（1 个）
Matt J
2020-1-17
Are you sure you do not instead want to compare the content of a variable in the table to something?... yes this what I'm trying to do.
Then why are you trying to apply < or > to the entire table? You should be applying it to a specific variable, like in the following example:
T =
5×6 table
LastName Age Smoker Height Weight BloodPressure
_________ ___ ______ ______ ______ _____________
'Sanchez' 38 true 71 176 124 93
'Johnson' 43 false 69 163 109 77
'Li' 38 true 64 131 125 83
'Diaz' 40 false 67 133 117 75
'Brown' 49 true 64 119 122 80
>> T.Age<=40
ans =
5×1 logical array
1
0
1
1
0
7 个评论
sani
2020-1-17
Walter Roberson
2020-1-17
prev = 0;
That is a specific numeric value.
if lt(prev,T1.time(i))
First round, you compare the specific numeric value to the numeric time. All is well.
prev = T1(i,1);
You just set prev to the entire table row - a table with an unknown number of variables and one row in it. Wouldn't it make more sense to set prev to T1.time(i) ?
sani
2020-1-17
Walter Roberson
2020-1-17
Correction, T1(i,1) is not an entire row, but it is a sub-table with one row and the same variable as the first variable in the table T1.
sani
2020-1-17
Walter Roberson
2020-1-18
Change
prev = T1(i,1);
to
prev = T1{i,1};
sani
2020-1-18
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