SOLVE ISNT GIVING ME MULTIPLE OUTPUTS

i have multiple inputs of that when put in the only four solves at the bottom only give one output unlike they should

for i = 1 : 80
  s(i+1) = i;
  Y = sym('Y');
  syms S
  S = solve (Y==((0.02*i)+0.15),Y);
end
syms P1
syms P2
syms P3
syms P4
P1 = solve (P1==((8*0.85)/((8*S)-1))-(27/(64*(S^2))),P1)
P2 = solve (P2==((8*0.9)/((8*S)-1))-(27/(64*(S^2))),P2)
P3 = solve (P3==((8*0.95)/((8*S)-1))-(27/(64*(S^2))),P3)
P4 = solve (P4==((8*1)/((8*S)-1))-(27/(64*(S^2))),P4)

Answer 1

[madhan ravi]

Loop is inefficient so use subs instead:

syms Y P1 P2 P3 P4 s
 
 
S = solve (Y==((0.02*s)+0.15),Y);
 
P1 = solve (P1==((8*0.85)/((8*S)-1))-(27/(64*(S^2))),P1);
P2 = solve (P2==((8*0.9)/((8*S)-1))-(27/(64*(S^2))),P2);
P3 = solve (P3==((8*0.95)/((8*S)-1))-(27/(64*(S^2))),P3);
P4 = solve (P4==((8*1)/((8*S)-1))-(27/(64*(S^2))),P4);
s=1:80;
P1=vpa(subs(P1,s),4)
P2=vpa(subs(P2,s),4)
P3=vpa(subs(P3,s),4)
P4=vpa(subs(P4,s),4)

[callum roberts]

The lowercase "s" is giving an error that it is undefined in the first solve

[madhan ravi]

see edited answer

[callum roberts]

The output of p1,p2,p3 and p4 are including s in teh answer not giving me mutiple values

P1 =
 
34/(5*((4*s)/25 + 1/5)) - 27/(64*(s/50 + 3/20)^2)
 
 
P2 =
 
36/(5*((4*s)/25 + 1/5)) - 27/(64*(s/50 + 3/20)^2)
 
 
P3 =
 
38/(5*((4*s)/25 + 1/5)) - 27/(64*(s/50 + 3/20)^2)
 
 
P4 =
 
8/((4*s)/25 + 1/5) - 27/(64*(s/50 + 3/20)^2)

[madhan ravi]

did you try my answer?

[madhan ravi]

>> syms Y P1 P2 P3 P4 s
 
 
S = solve (Y==((0.02*s)+0.15),Y);
 
P1 = solve (P1==((8*0.85)/((8*S)-1))-(27/(64*(S^2))),P1);
P2 = solve (P2==((8*0.9)/((8*S)-1))-(27/(64*(S^2))),P2);
P3 = solve (P3==((8*0.95)/((8*S)-1))-(27/(64*(S^2))),P3);
P4 = solve (P4==((8*1)/((8*S)-1))-(27/(64*(S^2))),P4);
s=1:80;
P1=vpa(subs(P1,s),4)
P2=vpa(subs(P2,s),4)
P3=vpa(subs(P3,s),4)
P4=vpa(subs(P4,s),4)
 
P1 =
 
[ 4.291, 1.391, 0.4337, 0.1203, 0.05, 0.07503, 0.1352, 0.2046, 0.2724, 0.3339, 0.3878, 0.4339, 0.4728, 0.5052, 0.5321, 0.554, 0.5717, 0.5858, 0.5969, 0.6054, 0.6116, 0.616, 0.6188, 0.6202, 0.6205, 0.6198, 0.6183, 0.6161, 0.6133, 0.61, 0.6063, 0.6022, 0.5979, 0.5933, 0.5885, 0.5836, 0.5785, 0.5734, 0.5681, 0.5629, 0.5575, 0.5522, 0.5469, 0.5416, 0.5363, 0.531, 0.5257, 0.5205, 0.5154, 0.5103, 0.5052, 0.5002, 0.4953, 0.4904, 0.4856, 0.4808, 0.4761, 0.4715, 0.4669, 0.4624, 0.458, 0.4536, 0.4493, 0.445, 0.4409, 0.4367, 0.4327, 0.4287, 0.4248, 0.4209, 0.4171, 0.4133, 0.4096, 0.406, 0.4024, 0.3989, 0.3954, 0.392, 0.3886, 0.3853]
 
 
P2 =
 
[ 5.402, 2.16, 1.022, 0.5965, 0.45, 0.4199, 0.4382, 0.4749, 0.5163, 0.5561, 0.5918, 0.6226, 0.6482, 0.6692, 0.6859, 0.6989, 0.7087, 0.7157, 0.7204, 0.723, 0.724, 0.7235, 0.7219, 0.7193, 0.7158, 0.7116, 0.7068, 0.7016, 0.6959, 0.69, 0.6838, 0.6774, 0.6709, 0.6642, 0.6575, 0.6507, 0.6439, 0.637, 0.6302, 0.6235, 0.6167, 0.61, 0.6034, 0.5968, 0.5903, 0.5839, 0.5776, 0.5713, 0.5651, 0.5591, 0.5531, 0.5472, 0.5413, 0.5356, 0.53, 0.5245, 0.519, 0.5137, 0.5084, 0.5032, 0.4981, 0.4931, 0.4882, 0.4833, 0.4786, 0.4739, 0.4693, 0.4648, 0.4604, 0.456, 0.4517, 0.4475, 0.4433, 0.4392, 0.4352, 0.4313, 0.4274, 0.4235, 0.4198, 0.4161]
 
 
P3 =
 
[ 6.513, 2.929, 1.61, 1.073, 0.85, 0.7647, 0.7412, 0.7452, 0.7602, 0.7783, 0.7959, 0.8112, 0.8237, 0.8331, 0.8397, 0.8438, 0.8457, 0.8456, 0.8438, 0.8407, 0.8364, 0.8311, 0.825, 0.8183, 0.811, 0.8033, 0.7953, 0.787, 0.7786, 0.77, 0.7613, 0.7526, 0.7439, 0.7351, 0.7264, 0.7178, 0.7092, 0.7007, 0.6924, 0.6841, 0.6759, 0.6678, 0.6599, 0.6521, 0.6444, 0.6368, 0.6294, 0.6221, 0.6149, 0.6078, 0.6009, 0.5941, 0.5874, 0.5809, 0.5744, 0.5681, 0.5619, 0.5559, 0.5499, 0.544, 0.5383, 0.5326, 0.5271, 0.5217, 0.5163, 0.5111, 0.5059, 0.5009, 0.4959, 0.4911, 0.4863, 0.4816, 0.477, 0.4724, 0.468, 0.4636, 0.4593, 0.4551, 0.4509, 0.4469]
 
 
P4 =
 
[ 7.624, 3.698, 2.198, 1.549, 1.25, 1.11, 1.044, 1.015, 1.004, 1.001, 1.0, 0.9999, 0.9991, 0.997, 0.9936, 0.9887, 0.9826, 0.9754, 0.9673, 0.9583, 0.9487, 0.9386, 0.9281, 0.9173, 0.9062, 0.8951, 0.8838, 0.8725, 0.8612, 0.85, 0.8388, 0.8278, 0.8168, 0.8061, 0.7954, 0.7849, 0.7746, 0.7644, 0.7545, 0.7447, 0.7351, 0.7256, 0.7164, 0.7073, 0.6984, 0.6897, 0.6812, 0.6728, 0.6646, 0.6566, 0.6488, 0.6411, 0.6335, 0.6261, 0.6189, 0.6118, 0.6049, 0.598, 0.5914, 0.5848, 0.5784, 0.5722, 0.566, 0.56, 0.5541, 0.5483, 0.5426, 0.537, 0.5315, 0.5262, 0.5209, 0.5157, 0.5106, 0.5057, 0.5008, 0.496, 0.4913, 0.4866, 0.4821, 0.4776]
 
>> 

[callum roberts]

yup it works thankyou very much for your time

[madhan ravi]

Anytime :)