writing "if" command for a>f>c

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mohammad
mohammad 2011-8-30
how can write if command for < and > together. for example if 1.01>a>0.9 then do cprintf('g','ok') else do cprintf('r','not ok'). when i write this like this: if 1.01>a>0.9 cprintf('g','ok'); else cprintf('r','not ok');
matlab only considers 1.01>a
thanks alot

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Paulo Silva
Paulo Silva 2011-8-30
There's no cprintf on MATLAB, use disp to show simple messages on the command line or fprintf for extra features.
a=1;
if 1.01>a && a>0.9
disp('ok')
else
disp('not ok')
end
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Paulo Silva
Paulo Silva 2011-8-30
or(a>5, a<3) %first way to do the or
a>5 || a<3 %second way to do the or
Both ways do the same thing
doc or %see the documentation of the or function, same goes for the and function
mohammad
mohammad 2011-8-31
really thanks Paulo

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geomod
geomod 2011-8-30
I cannot say why but, if you write:
if 0.9<a<1.01
OR
if 1.01>a && a>0.9
then it should run...
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mohammad
mohammad 2011-8-30
thanks 4 reply
if 0.9<a<1.01 not work
but 1.01>a && a>0.9 works
if there is no way to work in form like 0.9<a<1.01 , i use && form?
Walter Roberson
Walter Roberson 2011-8-31
if 0.9<a<1.01
means
if (0.9<a)<1.01
The part in () will evaluate to a logical value, either false (numeric 0) or true (numeric 1). Both 0 and 1 are < 1.01 so the overall expression would always evaluate as true.
MATLAB has no three-part logical operators at all, no built in way to test ranges.
If you wanted to really mess with the mind of the person reading the code, you could use:
if ~isempty(0.9:a-0.9:1.01)

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