Only certain values cannot be retrieved from the data in increments of 0.1

I am trying to extract values from 0 to 0.9 in increments of 0.1 using pandas.
I can't take out 0.6 for some reason.
We have verified that 0.6 exists, but cannot retrieve it.

aa=pd.DataFrame()
for i in range (10):
    aa=aa.append(b["Gate Voltage [V]"] == 0.100*i]))
aa

Run Results

The value of 0.6 is stored in the data frame of b, but for some reason it does not appear.

Copy of column 0.6

0.600   1.898000e-10    -3.000000e-14   -1.894200e-10   3.010000e-12    2.200000e-12    0.0 forward 0.0 6.305648e+01    0.0 inf 10  10  rgb(133.0614857142856,87.03999999999999,220.16)

Additional information

aa=aa.append(b["Gate Voltage [V]"] == round(0.1*i,1)])

If you do as you pointed out, the time of 0.7 will not displayed.
We have verified that 0.7 is also present (we saw it before we added it).

Additional information

zzz=pd.DataFrame()
b=df_register[0][df_register[0]["Body Resistance"]==a[0]]
za=b [b["Gate Voltage [V]"] == 0.7]
za
zzz=zzz.append(za)
za=b [b["Gate Voltage [V]"] == 0.9]
zzz=zzz.append(za)
za=b [b["Gate Voltage [V]"] == 0.8]
zzz=zzz.append(za)
zzz

Running this program does not show up when it is 0.7.

python pandas

2022-09-29 22:35

2 Answers

aa=pd.DataFrame()
for i in range (6,11):
    aa=aa.append(b["Gate Voltage [V]"]*1000).astype("int")==i*100]))
# aaaa=aa.append((b["Gate Voltage [V]"] == round(0.1*i,1)])
aa

So it worked well.
The decimal point seems to have been bad.

Dear metropolis and akira ejiri,
Thank you.

2022-09-29 22:35

I don't think 0.100*i will be in increments of 0.1.

aa=aa.append(b["Gate Voltage [V]"] == 0.100*i]))

aa=aa.append(b[round(b["Gate Voltage [V]"]], 1) == round (0.100*i, 1)]))

Why don't you correct it as shown in ?

2022-09-29 22:35

If you have any answers or tips

Popular Tags

python x 4647

android x 1593

java x 1494

javascript x 1427

c x 927

c++ x 878

ruby-on-rails x 696

php x 692

python3 x 685

html x 656