1x4 matrix assigning values to a variable

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So say i have a 1x4 matrix like this :

b =
7.1555540396380393239417370831804
 1.993753283660616260599428304438
0.12926899451597696747749296398951
-11.278576317814632552018658351608

And i want to set any values greater than 1 to b1, then b2, then b3 etc. The original values of the matrix can change completely so i need it to be robust in that it will just either assign the variable or move on to the next value. I hope that makes sense. For this example I'd want to receive back b1=7.155.... b2=1.9937....

so far i though of this but it doesnt work when the x matrix changes size

x=b(find(b>1))
b1=x(1)
b2=x(2)
b3=x(3)
b4=x(4)

Thanks,

Joshua

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Azzi Abdelmalek 2014-3-3

This is not clear. How b, b1, b2, ... are related?

Joshua 2014-3-3

b is just a matrix, i just want to label to values of the matrix that are above one as b1, b2 etc

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Answer 1

Azzi Abdelmalek 2014-3-3

编辑：Azzi Abdelmalek 2014-3-3

在 MATLAB Online 中打开

0 个投票

x=b(find(b>1))

x contains all what you want. Why do you want to creates the variables a1, a2, ...?

Read this link

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

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Joshua 2014-3-3

在 MATLAB Online 中打开

This is my full script:

clear
g=9.81;
h=10;
u=1.5;
syms a b c d
a=u./sqrt(g.*h)
h=10;
d=0.5;
c=0.5;
b=solve(((a^(2).*b^4)/2)+2.*c.*a^(2).*b^(3)-(2-2.*d+a^(2)).*b^(2)-(4.*c+2.*c.*a^(2)-4).*b+((a^(2)/2)+4.*c-2.*c^(2).*d-2),b,'MaxDegree',3);
x=b(find(b>1))
b1=x(1)
b2=x(2)
b3=x(3)
b4=x(4)

i want to use the values given in the solve function that are greater than 1 in another equation next, but the variables in the solve function can change so the b matrix might have all values above 1 or none, if that makes sense?

Azzi Abdelmalek 2014-3-3

在 MATLAB Online 中打开

Ok, until

x=b(b>1)

it's ok

why

b1=x(1) ?

x contains all what you want, why to create other variables b1, b2,...?

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1x4 matrix assigning values to a variable

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