Hi...can we create a variable "a" with double array type ? . Thank.
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i did tried commands : str2num,str2double...but it not true
3 Kommentare
Jan
am 12 Okt. 2017
Your English is fine enough to explain the problem with more details. I'm not a native English speaker also, like many other users of this forum. Beside the language, it is difficult to explain a problem in general, because as long as it is not solved, it is not clear, which parts are relevant or not. Simply try to explain it again with more details. Prefer to edit the question, such that the reader find all details in one location.
I'm not "bro", but I have a name: "Jan". I assume, the other persons in the forum not "bros" also. ;-)
Antworten (3)
Adam
am 12 Okt. 2017
a = 7;
is a variable 'a' of type double.
Or even
a = [];
is also type double, but with empty contents.
John D'Errico
am 12 Okt. 2017
Bearbeitet: John D'Errico
am 12 Okt. 2017
You want to create an array that has double precision class, thus a "double", but contains a string, 'a'.
Sorry, but you cannot do so. A double can contain ONLY numbers. Those elements must all be of class double.
If you create an array that contains a string, 'a', it must be either of class char, or a cell array.
A = 'a'
A =
'a'
B = {'a'}
B =
1×1 cell array
{'a'}
whos
Name Size Bytes Class Attributes
A 1x1 2 char
B 1x1 114 cell
7 Kommentare
Jan
am 12 Okt. 2017
@super bad: This sound really magic. I still do not have any idea, what you are talking about. What is "a", "b" and "s"? What are your inputs, what is the wanted output and which problem do you try to solve? Why do you want to operate on "strings", "symbols" (what ever this is) and numerical matrices at the same time?
Mridul Gandhi
am 9 Jun. 2019
Maybe you mean this:
I=5;
J=5;
a=sym('a',[I J]);
Creates variable 'a' of size (IxJ):
a =
[ a1_1, a1_2, a1_3, a1_4, a1_5]
[ a2_1, a2_2, a2_3, a2_4, a2_5]
[ a3_1, a3_2, a3_3, a3_4, a3_5]
[ a4_1, a4_2, a4_3, a4_4, a4_5]
[ a5_1, a5_2, a5_3, a5_4, a5_5]
2 Kommentare
Rik
am 25 Jan. 2021
As detailed in several comments: that is not possible. There are many options of what you could mean in this thread. Which do you want?
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