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Makking matrix in a for cycle

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Dominik Cech
Dominik Cech on 31 Aug 2021
Answered: Chunru on 31 Aug 2021
hello i have this two cyclces where i count cordinates of a surface. I do 20 steps in cycle. I would like to make a matrix that wil be 20x3 for every step. So i the end i want to have 20 of 20x3 matrix
clear all
for u=0:.05:1
for v=0:.05:1
x=[v^3,u*v,u^2-1]
plot3(x(1),x(2),x(3),'*')
hold on
end
end
0 0 0
x =
0.0001 0 0.0500
x =
0.0010 0 0.1000
x =
0.0034 0 0.1500
x =
0.0080 0 0.2000
x =
0.0156 0 0.2500
x =
0.0270 0 0.3000
x =
0.0429 0 0.3500
x =
0.0640 0 0.4000
x =
0.0911 0 0.4500
x =
0.1250 0 0.5000
x =
0.1664 0 0.5500
x =
0.2160 0 0.6000
x =
0.2746 0 0.6500
x =
0.3430 0 0.7000
x =
0.4219 0 0.7500
x =
0.5120 0 0.8000
x =
0.6141 0 0.8500
x =
0.7290 0 0.9000
x =
0.8574 0 0.9500
x =
1 0 1
first matrix
0 0.0500 0
x =
0.0001 0.0500 0.0500
x =
0.0010 0.0500 0.1000
x =
0.0034 0.0500 0.1500
x =
0.0080 0.0500 0.2000
x =
0.0156 0.0500 0.2500
x =
0.0270 0.0500 0.3000
x =
0.0429 0.0500 0.3500
x =
0.0640 0.0500 0.4000
x =
0.0911 0.0500 0.4500
x =
0.1250 0.0500 0.5000
x =
0.1664 0.0500 0.5500
x =
0.2160 0.0500 0.6000
x =
0.2746 0.0500 0.6500
x =
0.3430 0.0500 0.7000
x =
0.4219 0.0500 0.7500
x =
0.5120 0.0500 0.8000
x =
0.6141 0.0500 0.8500
x =
0.7290 0.0500 0.9000
x =
0.8574 0.0500 0.9500
x =
1.0000 0.0500 1.0000
second matrix and so
  1 Comment
Dominik Cech
Dominik Cech on 31 Aug 2021
I dont know how to save the result from the loop in to the matrix. So i would be glad if anyone can help, thank you

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Answers (1)

Chunru
Chunru on 31 Aug 2021
Ran in:
u=0:.05:1;
v=0:.05:1;
nu = length(u);
nv = length(v);
output = zeros(nu, nv, 3);
for iu=1:nu
for iv=1:nv
x=[v(iv)^3, u(iu)*v(iv), u(iu)^2-1];
plot3(x(1),x(2),x(3),'*');
hold on
output(iu, iv, :) = x;
end
end
output
output =
output(:,:,1) = 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 0 0.0001 0.0010 0.0034 0.0080 0.0156 0.0270 0.0429 0.0640 0.0911 0.1250 0.1664 0.2160 0.2746 0.3430 0.4219 0.5120 0.6141 0.7290 0.8574 1.0000 output(:,:,2) = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0025 0.0050 0.0075 0.0100 0.0125 0.0150 0.0175 0.0200 0.0225 0.0250 0.0275 0.0300 0.0325 0.0350 0.0375 0.0400 0.0425 0.0450 0.0475 0.0500 0 0.0050 0.0100 0.0150 0.0200 0.0250 0.0300 0.0350 0.0400 0.0450 0.0500 0.0550 0.0600 0.0650 0.0700 0.0750 0.0800 0.0850 0.0900 0.0950 0.1000 0 0.0075 0.0150 0.0225 0.0300 0.0375 0.0450 0.0525 0.0600 0.0675 0.0750 0.0825 0.0900 0.0975 0.1050 0.1125 0.1200 0.1275 0.1350 0.1425 0.1500 0 0.0100 0.0200 0.0300 0.0400 0.0500 0.0600 0.0700 0.0800 0.0900 0.1000 0.1100 0.1200 0.1300 0.1400 0.1500 0.1600 0.1700 0.1800 0.1900 0.2000 0 0.0125 0.0250 0.0375 0.0500 0.0625 0.0750 0.0875 0.1000 0.1125 0.1250 0.1375 0.1500 0.1625 0.1750 0.1875 0.2000 0.2125 0.2250 0.2375 0.2500 0 0.0150 0.0300 0.0450 0.0600 0.0750 0.0900 0.1050 0.1200 0.1350 0.1500 0.1650 0.1800 0.1950 0.2100 0.2250 0.2400 0.2550 0.2700 0.2850 0.3000 0 0.0175 0.0350 0.0525 0.0700 0.0875 0.1050 0.1225 0.1400 0.1575 0.1750 0.1925 0.2100 0.2275 0.2450 0.2625 0.2800 0.2975 0.3150 0.3325 0.3500 0 0.0200 0.0400 0.0600 0.0800 0.1000 0.1200 0.1400 0.1600 0.1800 0.2000 0.2200 0.2400 0.2600 0.2800 0.3000 0.3200 0.3400 0.3600 0.3800 0.4000 0 0.0225 0.0450 0.0675 0.0900 0.1125 0.1350 0.1575 0.1800 0.2025 0.2250 0.2475 0.2700 0.2925 0.3150 0.3375 0.3600 0.3825 0.4050 0.4275 0.4500 0 0.0250 0.0500 0.0750 0.1000 0.1250 0.1500 0.1750 0.2000 0.2250 0.2500 0.2750 0.3000 0.3250 0.3500 0.3750 0.4000 0.4250 0.4500 0.4750 0.5000 0 0.0275 0.0550 0.0825 0.1100 0.1375 0.1650 0.1925 0.2200 0.2475 0.2750 0.3025 0.3300 0.3575 0.3850 0.4125 0.4400 0.4675 0.4950 0.5225 0.5500 0 0.0300 0.0600 0.0900 0.1200 0.1500 0.1800 0.2100 0.2400 0.2700 0.3000 0.3300 0.3600 0.3900 0.4200 0.4500 0.4800 0.5100 0.5400 0.5700 0.6000 0 0.0325 0.0650 0.0975 0.1300 0.1625 0.1950 0.2275 0.2600 0.2925 0.3250 0.3575 0.3900 0.4225 0.4550 0.4875 0.5200 0.5525 0.5850 0.6175 0.6500 0 0.0350 0.0700 0.1050 0.1400 0.1750 0.2100 0.2450 0.2800 0.3150 0.3500 0.3850 0.4200 0.4550 0.4900 0.5250 0.5600 0.5950 0.6300 0.6650 0.7000 0 0.0375 0.0750 0.1125 0.1500 0.1875 0.2250 0.2625 0.3000 0.3375 0.3750 0.4125 0.4500 0.4875 0.5250 0.5625 0.6000 0.6375 0.6750 0.7125 0.7500 0 0.0400 0.0800 0.1200 0.1600 0.2000 0.2400 0.2800 0.3200 0.3600 0.4000 0.4400 0.4800 0.5200 0.5600 0.6000 0.6400 0.6800 0.7200 0.7600 0.8000 0 0.0425 0.0850 0.1275 0.1700 0.2125 0.2550 0.2975 0.3400 0.3825 0.4250 0.4675 0.5100 0.5525 0.5950 0.6375 0.6800 0.7225 0.7650 0.8075 0.8500 0 0.0450 0.0900 0.1350 0.1800 0.2250 0.2700 0.3150 0.3600 0.4050 0.4500 0.4950 0.5400 0.5850 0.6300 0.6750 0.7200 0.7650 0.8100 0.8550 0.9000 0 0.0475 0.0950 0.1425 0.1900 0.2375 0.2850 0.3325 0.3800 0.4275 0.4750 0.5225 0.5700 0.6175 0.6650 0.7125 0.7600 0.8075 0.8550 0.9025 0.9500 0 0.0500 0.1000 0.1500 0.2000 0.2500 0.3000 0.3500 0.4000 0.4500 0.5000 0.5500 0.6000 0.6500 0.7000 0.7500 0.8000 0.8500 0.9000 0.9500 1.0000 output(:,:,3) = -1.0000 -1.0000 -1.0000 -1.0000 -1.0000 -1.0000 -1.0000 -1.0000 -1.0000 -1.0000 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