複数の陰関数を一度にプロットする方法

fimplicitを使って、円グラフを例えば３つ同時に描画させるため、つぎのコードを記載しましたが、

うまく動きません。エラーメッセージは次の通りでです。「警告: 関数が配列入力で予期せぬ動作をします。パフォーマンスを向上させるために、入力引数と同じサイズと形状をもつ出力を返すように関数を適切にベクトル化してください。」

どこがまずいのか、ご教示をよろしくお願いいたします。

Ia_start = 1

Ia_end = 5

Ia_count = 2

Ia = Ia_start : Ia_count : Ia_end

figure

fimplicit(@(id,iq) id.^2+iq.^2 - Ia.^2)

Answer 1

[Dyuman Joshi]

You will have to draw the 3 implicit curves separetly -

Ia_start = 1;
Ia_end = 5;
Ia_count = 2;

figure
hold on
for Ia = Ia_start : Ia_count : Ia_end
    fimplicit(@(id,iq) id.^2+iq.^2 - Ia.^2);
end
hold off
xticks(-5:5)

[高木 範明]

Thank you for your prompt guidance.

I understand that it is difficult to plot all at once in fimplicit. I will try to deal with it in the way you have taught me.

Answer 2

[Atsushi Ueno]

This is another method. Creating a function handle (cell) array allows a single call to the fimplicit function.

Ia_start = 1;
Ia_end = 5;
Ia_count = 2;
Ia2 = Ia_start : Ia_count : Ia_end;
fun = arrayfun(@(Ia) @(id,iq) id.^2+iq.^2 - Ia.^2, Ia2, 'uni', false);
figure
fimplicit(fun);

[高木 範明]

Thank you for sharing your wonderful method with me. I was not aware of this method. Thank you again.