What does the ~ and | mean in the following code?

Hello,

I've got the following code, that should write CNTLON to the com port to a robotic arm with the mmPrintf function. The mmScanf reads the response of the robot. What does the ~ and the | mean?

r1 = mmPrintf(robot, 'CNTLON'); [~, r2] = mmScanf(robot); r = r1 | r2;

Thanks!

Answer 1

[Star Strider]

The tilde (~) means that mmScanf(robot) should not return whatever the value is for the first output. The following code apparently doesn’t use it.

The bar () is the logical ‘or’. In this case, |r becomes either r1 or r2.

Answer 2

[Jos (10584)]

take a look at this example

A = 1:10

q = A < 4
p = A < 7
np = ~p
r = q | np
B = A(r)
help not
help or