9:23 a.m.
Hi,
is it possible to use "%x" formatter in conjunction with "%m" in
sscanf
(i.e. perform hex-to-int conversion of array of strings into a matrix)?
Marcin
--
Marcin Błażejowski
8:58 a.m.
Am 03.11.2019 um 10:23 schrieb Marcin Błażejowski:
Hi,
is it possible to use "%x" formatter in conjunction with "%m" in
sscanf
(i.e. perform hex-to-int conversion of array of strings into a matrix)?
I didn't even know that %x is supported in gretl's sscanf (not
documented I think), but it seems to work in plain usage. I wouldn't
know how to combine this with the special construct %m.
But if you already know that your input can only be hex integers,
perhaps simply do something like this:
<hansl>
matrix m
strings s2 = defarray("A","B")
string sf = toupper(flatten(s2))
string s = strsub(sf, "A", "10")
s = strsub(s, "B", "11")
s = strsub(s, "C", "12")
s = strsub(s, "D", "13")
s = strsub(s, "E", "14")
s = strsub(s, "F", "15")
sscanf(s, "%m", m)
print m
</hansl>
cheers
sven
10:26 a.m.
Am 04.11.2019 um 09:58 schrieb Sven Schreiber:
Am 03.11.2019 um 10:23 schrieb Marcin Błażejowski:
But if you already know that your input can only be hex integers,
perhaps simply do something like this:
<hansl>
matrix m
strings s2 = defarray("A","B")
string sf = toupper(flatten(s2))
string s = strsub(sf, "A", "10")
Sorry Marcin, of course this won't work if you have several (hex) digits
in your input numbers. Then I can only think of more clumsy loop-based
solutions, like you probably did yourself.
cheers
sven
12:41 p.m.
On 04.11.2019 09:58, Sven Schreiber wrote:
matrix m
strings s2 = defarray("A","B")
string sf = toupper(flatten(s2))
string s = strsub(sf, "A", "10")
s = strsub(s, "B", "11")
s = strsub(s, "C", "12")
s = strsub(s, "D", "13")
s = strsub(s, "E", "14")
s = strsub(s, "F", "15")
sscanf(s, "%m", m)
print m
Hi Sven,
I solved it in the following form:
<hansl>
strings s2 = defarray("A","B")
scalar iter = nelem(s2)
matrix m = zeros(iter)
loop i=1..iter --quiet
sscanf(s2[i], "%x", m[i])
endloop
print m
</hansl>
Cheers,
Marcin
--
Marcin Błażejowski
2:22 p.m.
On 04.11.2019 13:41, Marcin Błażejowski wrote:
On 04.11.2019 09:58, Sven Schreiber wrote:
> matrix m
> strings s2 = defarray("A","B")
> string sf = toupper(flatten(s2))
>
> string s = strsub(sf, "A", "10")
> s = strsub(s, "B", "11")
> s = strsub(s, "C", "12")
> s = strsub(s, "D", "13")
> s = strsub(s, "E", "14")
> s = strsub(s, "F", "15")
>
> sscanf(s, "%m", m)
> print m
Hi Sven,
I solved it in the following form:
<hansl>
strings s2 = defarray("A","B")
scalar iter = nelem(s2)
matrix m = zeros(iter)
loop i=1..iter --quiet
sscanf(s2[i], "%x", m[i])
endloop
print m
</hansl>
Cheers,
Marcin
Sven,
your version is much faster!!!
Cheers,
Marcin
--
Marcin Błażejowski
9:58 p.m.
On Sun, 3 Nov 2019, Marcin Błażejowski wrote:
is it possible to use "%x" formatter in conjunction with
"%m" in sscanf
(i.e. perform hex-to-int conversion of array of strings into a matrix)?
You can't combine "%x" and "%m" as such. But let's try
scanning:
<hansl>
strings S = defarray("0x01", "0xff", "0xea",
"0x22")
matrix m = {}
sscanf(S, "%m", m)
print m
</hansl>
Output:
? print m
m (4 x 1)
1
255
234
34
So it "just works" without requiring "%x", so long as the hex
strings are identified as such via the "0x" prefix.
Allin
5:15 a.m.
On 06.11.2019 22:58, Allin Cottrell wrote:
On Sun, 3 Nov 2019, Marcin Błażejowski wrote:
> is it possible to use "%x" formatter in conjunction with "%m" in
sscanf
> (i.e. perform hex-to-int conversion of array of strings into a matrix)?
You can't combine "%x" and "%m" as such. But let's try
scanning:
<hansl>
strings S = defarray("0x01", "0xff", "0xea",
"0x22")
matrix m = {}
sscanf(S, "%m", m)
print m
</hansl>
Output:
? print m
m (4 x 1)
1
255
234
34
So it "just works" without requiring "%x", so long as the hex
strings
are identified as such via the "0x" prefix.
Allin, thanx!!!
--
Marcin Błażejowski
1872
days inactive
1876
days old
7 comments
3 participants
participants (3)
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Allin Cottrell -
Marcin Błażejowski -
Sven Schreiber