MATLAB: Ignoring the negative values….

ignoring the negative values....

Hi to all ………..

a = rand(1,10)-0.5 cumsum(a)

the command uses all the positive and negative values generated , I want to ignore all the negative values generated once the cumsum command is executed. NOTE(negative values cannot be ignored and is being use in some other command)

Regards…..

Best Answer

 cumsum(a(a > 0))

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Hi,

if you have no complex numbers:

abs(A)

For complex numbers abs will calculate the magnitude.

Best regards

Stephan

MATLAB: How can i solve this equation

If you want to get multiple answers use vpasolve function. Set the number of answers you want yo get and the code will pick some then in a random way.

 syms lambda
Mt=1;    % The value of your variables
m=1;
L=1;
lt=1;
eqn= 1+(cos(lambda)*cosh(lambda))+((lambda*Mt/(m*L))*(cos(lambda)*sinh(lambda)-sin(lambda)*cosh(lambda)))-((lt*lambda^3)/m*L^3)*(cosh(lambda)*sin(lambda)+sinh(lambda)*cos(lambda))+ ((Mt*lt*lambda^4)/m^2*L^4)*(1-cosh(lambda)*cos(lambda)) ==0;
for n = 1:50 
  vpasolve(eqn,lambda,'random',true) 
end

this example gives you 50 answers. The answer before gives the first it finds.

Best Answer

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