matlab - Operation returns a scalar value when a vector of values is expected -

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i'm evaluating simple function:

y = (2*x)/sqrt( 1 + x.^2 );

where x vector 100 values in it. however, matlab makes y equal single scalar value in instance. if do:

y = 2*x;

i vector of values in y expected. if do:

y = x.^2;

i also vector of values in y expected.

why above equation y = (2*x)/sqrt( 1 + x.^2 ); giving single value , not vector of values?

the operation b/a (given b = 2*x , a = sqrt(1+x.^2)) attempt perform matrix right division, row vector x solution in least squares sense system of equations ya = b, results in scalar value y.

for element-wise array division, perform operation b./a instead (note .).


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