Trouble giving decimal input

Hi, my code is as shown below, i tried as switch function instead of else if statement. However, the code is taking only integer numbers, for decimal numbers showing 'out of range'.

function category = pH21Category(pH)

switch true

case any(pH == 0:2)

category = 'Strongly acidic';

case any(pH == 3:5)

category = 'Weakly acidic';

case ismember(pH,6:8)

category='Neutral';

case ismember(pH,9:11)

category='Weakly Basic';

case ismember(pH,12:14)

category=('Strongly basic');

otherwise

category=('out of range');

end

Answer 1

[Walter Roberson]

0:2 does not express the range starting from 0 and ending at 2.

0:2 expresses a vector of numbers starting from 0 and incrementing by 1 until 2 is reached. That is the vector containing 0, 1, and 2. No other values are included in 0:2

You will need to test

0<=ph & ph < 2

but think about whether you want < or <= for the bounds.

[Walter Roberson]

https://www.thoughtco.com/is-a-negative-ph-possible-603653