Function FLOAT in FORTRAN to Matlab

Hi everyone,

I've this Fortran code:

IF(j<11) THEN

r = FLOAT(j)*0.3

ELSEIF(j<=20)THEN

r = FLOAT(j)/5.0*3.0

ELSEIF(j<=30)THEN

r = FLOAT(j)*2.0

ELSEIF(j<=40) THEN

r =FLOAT(j)*5.0

How can I traslate this code in Matlab? In particular the function "FLOAT"

Answer 1

[DGM]

Unless I'm mistaken, float() would be equivalent to single(); dble() would be equivalent to double().

[John D'Errico]

Note that MATLAB will automatically do a conversion into a double, and since essentially everything is best done using doubles, unless there is a good reason not to do so, just use double is good advice here. All of that means you can essentially just ignore all of the float calls in that code. That is to say...

FLOAT(j)*/5.0*3.0 will be written in MATLAB as simply j/5.0*3.0.

Etc.

As well, the value j = 11, is already represented as a double by default. So if we do this:

j = 11;
whos j

  Name      Size            Bytes  Class     Attributes

  j         1x1                 8  double              

As you can see, j is already stored as a double. It is NOT stored using an explicitly integer form, even though all integers stored as doubles are represented exactly as integers as long as they do not exceed 2^53-1.