The way to make an array using function_h​undle(関数ハン​ドルを用いた配列の作​り方)

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Yoshiki Sato
Yoshiki Sato 2020-11-30
评论： Yoshiki Sato 2020-12-1
関数ハンドルを用いた配列の作り方をご教授願いたいです。
例えば、
for i=1:5, f[i]=i.*x
としたときに
f[1]=x, f[2]=2.*x, f[3]=3.*x, f[4]=4.*x, f[5]=5.*x
といったデータが格納されるようなプログラムは可能しょうか？
ぜひよろしくお願いします。
I want the way to make an array using function_hundle.
For example, when I define
for i=1:5, f[i]=i.*x,
I wish to be stored
f[1]=x, f[2]=2.*x, f[3]=3.*x, f[4]=4.*x, f[5]=5.*x.
Please tell me the way...
Thank you.
  2 个评论
sushanth govinahallisathyanarayana
sushanth govinahallisathyanarayana 2020-11-30
Is x an array or a single number?
vec=1:5
if it is a single number, then
f=vec.*x
if x is an array, then
f=x(:)*vec.' (assuming vec is a column vector)
Each column of vec will be x multiplied by the corresponding number.
Hope this helps.
Yoshiki Sato
Yoshiki Sato 2020-11-30
Thank you for your support.
x is a variable.
So, I want to get 5 function_fundles.
Could you give me any ideas?
I'm sorry for that I'm poor in English and Matlab...
Thank you.

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采纳的回答

Walter Roberson
Walter Roberson 2020-11-30
N = 5;
f = cell(N,1);
for i = 1 : N
f{i} = @(x) i.*x;
end
You cannot use () indexing to store different function handles; you have to use {} indexing.
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更多回答（1 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2020-11-30
编辑：KALYAN ACHARJYA 2020-11-30
Option 1:
i=1:5;
x=2;
f=i*x
Here resultant f array itself represents the f(1), f(2)..respectively depends on array length of i. Considering x is scalar.
Result:
f =
2 4 6 8 10
Option 2:
Please note function handle is different
i=1:5;
fun=@(x) i*x;
fun(2)
here created function handle with x as inputs. Once you pass the input as defined, it gives the resultant value
fun(2)
%...^ x value
You can create the function handle with both as inputs also
fun=@(i,x) i*x;
Result:
ans =
2 4 6 8 10
Option 3:
Create MATLAB custom function, save in the same working directory as fun1.m
function f=fun1(i,x)
f=i*x;
end
Now pass the input arguments from another matlab scripts or from command window
f=fun1(1:5,2)
Result:
>> f=fun1(1:5,2)
f =
2 4 6 8 10
Hope it helps! Keep Learning!
  1 个评论
Yoshiki Sato
Yoshiki Sato 2020-11-30
Thank you for your support.
I wish to get 5 function_fundles like a Mr. Walter's way...
Could you give me any ideas?
I'm sorry for that I'm poor in English and Matlab...
Thank you.

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