if condition problem and positive condition

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Redwood
Redwood le 18 Oct 2019
Commenté : Redwood le 19 Oct 2019
Dear Matlab experts,
I added "if condition" in the Matlab coding.
I defined m1 = n1-ee1, and I used "if condition" because I would like to get only positive value for m1.
However, I could not get any result.
if n1 <= ee1
m1 =0;
else if n1 > ee1
m1 = n1 - ee1;
My full coding is below. Please let me know how to fix it.
Thank you very much in advance.
Sincerely yours,
J1
t = 0:.0001: 5;
z = 1819;
e1 = -42;
e2 = -7;
e3= -20;
e4= -29;
e5 = -32;
e6 = -112;
e7 = -70;
e8 = -9;
e9 = -48;
e10 = -14;
e11 = -2;
e12 = -22;
e13= -42;
e14= -15;
e15 = -26;
e16 = -58;
e17 = -24;
e18 = -73;
e19 = -102;
e20 = -78;
e21 = -600;
e22 = -11;
e23= -65;
e24= -285;
e25 = -32;
p = exp(-t.*e1) + exp(-t.*e2) + exp(-t.*e3) + exp(-t.*e4) + exp(-t.*e5) + exp(-t.*e6) + exp(-t.*e7) + exp(-t.*e8) + exp(-t.*e9) + exp(-t.*e10) + exp(-t.*e11) + exp(-t.*e12) + exp(-t.*e13) + exp(-t.*e14) + exp(-t.*e15) + exp(-t.*e16) + exp(-t.*e17) + exp(-t.*e18) + exp(-t.*e19) + exp(-t.*e20) + exp(-t.*e21) + exp(-t.*e22) + exp(-t.*e23) + exp(-t.*e24) + exp(-t.*e25) ;
b1 = (exp(-t.*e1))./p;
b2 = (exp(-t.*e2))./p;
b3 = (exp(-t.*e3))./p;
b4 = (exp(-t.*e4))./p;
b5 = (exp(-t.*e5))./p;
b6 = (exp(-t.*e6))./p;
b7 = (exp(-t.*e7))./p;
b8 = (exp(-t.*e8))./p;
b9 = (exp(-t.*e9))./p;
b10 = (exp(-t.*e10))./p;
b11 = (exp(-t.*e11))./p;
b12 = (exp(-t.*e12))./p;
b13 = (exp(-t.*e13))./p;
b14 = (exp(-t.*e14))./p;
b15 = (exp(-t.*e15))./p;
b16 = (exp(-t.*e16))./p;
b17 = (exp(-t.*e17))./p;
b18 = (exp(-t.*e18))./p;
b19 = (exp(-t.*e19))./p;
b20 = (exp(-t.*e20))./p;
b21 = (exp(-t.*e21))./p;
b22 = (exp(-t.*e22))./p;
b23 = (exp(-t.*e23))./p;
b24 = (exp(-t.*e24))./p;
b25 = (exp(-t.*e25))./p;
n1 = z*b1;
n2 = z*b2;
n3 = z*b3;
n4 = z*b4;
n5 = z*b5;
n6 = z*b6;
n7 = z*b7;
n8 = z*b8;
n9 = z*b9;
n10 = z*b10;
n11 = z*b11;
n12 = z*b12;
n13 = z*b13;
n14 = z*b14;
n15 = z*b15;
n16 = z*b16;
n17 = z*b17;
n18 = z*b18;
n19 = z*b19;
n20 = z*b20;
n21 = z*b21;
n22 = z*b22;
n23 = z*b23;
n24 = z*b24;
n25 = z*b25;
ee1 = 42;
ee2 = 7;
ee3 = 20;
ee4 = 29;
ee5 = 32;
ee6 = 112;
ee7 = 70;
ee8 = 9;
ee9 = 48;
ee10 = 14;
ee11 = 2;
ee12 = 22;
ee13 = 42;
ee14 = 15;
ee15 = 26;
ee16 = 58;
ee17 = 24;
ee18 = 73;
ee19 = 102;
ee20 = 78;
ee21 = 600;
ee22 = 11;
ee23 = 65;
ee24 = 285;
ee25 = 32;
m1 = n1 - ee1;
m2 = n2 - ee2;
m3 = n3 - ee3;
m4 = n4 - ee4;
m5 = n5 - ee5;
m6 = n6 - ee6;
m7 = n7 - ee7;
m8 = n8 - ee8;
m9 = n9 - ee9;
m10 = n10 - ee10;
m11 = n11 - ee11;
m12 = n12 - ee12;
m13 = n13 - ee13;
m14 = n14 - ee14;
m15 = n15 - ee15;
m16 = n16 - ee16;
m17 = n17 - ee17;
m18 = n18 - ee18;
m19 = n19 - ee19;
m20 = n20 - ee20;
m21 = n21 - ee21;
m22 = n22 - ee22;
m23 = n23 - ee23;
m24 = n24 - ee24;
m25 = n25 - ee25;
if n1 <= ee1
m1 =0;
else if n1 > ee1
m1 = n1 - ee1;
y = m1.*m1 + m2.*m2 + m3.*m3 + m4.*m4 + m5.*m5 + m6.*m6 + m7.*m7 + m8.*m8+ m9.*m9 + m10.*m10 +m11.*m11 + m12.*m12 + m13.*m13 + m14.*m14 + m15.*m15 + m16.*m16 + m17.*m17 + m18.*m18+ m19.*m19 + m20.*m20+ m21.*m21 + m22.*m22 + m23.*m23 + m24.*m24 + m25.*m25;
plot(t, sqrt(y))
[ymin, yi] = min(y);
tmin = t(yi)
ymin =y(yi)

Réponse acceptée

Image Analyst
Image Analyst le 19 Oct 2019
You separated the else and the if. It should be elseif (one word) but actually you don't even need it. Try this:
if n1 <= ee1
m1 = 0;
else
m1 = n1 - ee1;
end
  1 commentaire
Redwood
Redwood le 19 Oct 2019
Thank you very much!!! It works!!!
Sincerely yours,
J1

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