Questions tagged [calculator]
The calculator tag has no usage guidance.
31
questions
0
votes
0answers
25 views
Debian on TI-Nspire
I am following this tutorial: https://ivoah.net/blog/2016/03/20/how-to-install-debian-on-a-ti-nspire/ (I have all of the required items.)
I am using an Acer Chromebook C720, which I dual-booted Debian ...
0
votes
0answers
18 views
Why does wcalc output rounding symbol (~=) for integer operations (subtraction)?
I have noted, that man wcalc says:
--ints
Toggles whether long integers will be abbreviated or not. This conflicts with engineering
notation for large numbers, but ...
2
votes
2answers
223 views
Calculations in shell Unix
I'm trying to work out the difference in 2 unix times to do a simple calculation (in a shell script) but it doesn't seem to work.
I have set 2 variables one called $d and the other $c.
Here's the ...
-1
votes
1answer
148 views
How can i check if a number is higher or lower then another number?
I have files that contain 2 numbers like the following:
File 1
1
0
File 2
0
1
File 3
3
3
I want to compare the number on the first line to the number on the second line.
If the number on the ...
1
vote
1answer
229 views
Gnome's calculator: “Malformed expression”
I can't calculate a simple math expression 1.3e4 * 10 in the Gnome's calculator in scientific mode, I just get "Malformed expression" warning below the number pane. What am I supposed to do?
39
votes
21answers
38k views
Simple command-line calculator
Issue:
Every now and then I need to do simple arithmetic in a command-line environment. E.G. given the following output:
Disk /dev/sdb: 256GB
Sector size (logical/physical): 512B/512B
Partition Table:...
2
votes
0answers
32 views
Financial calculations without floating point numbers in console?
I need to do simple financial calculations on Linux and had been using wcalc for this until I stumbled upon a wrong result caused by floating-point number issues. Is there a calculator (I really would ...
2
votes
1answer
104 views
How to call a function from wcalc?
wcalc has built in constants in functions.
I'm trying to call the abs function.
If I input
wcalc abs(-2)
I get
syntax error
= -2
Unless I enter interactive mode where it works.
3
votes
4answers
2k views
currency conversion calculator in debian
sometime back I saw a calculator with currency conversion built-in with an option to update to current rates if so desired. Does anybody know what I'm talking about ? Saw it in debian.
1
vote
1answer
861 views
How do I clear gnome-calculator history?
How do I clear gnome calculator history? Like in terminal, we can press Ctrl L to clear, but what about calculator? I also don't see a clear button?
1
vote
2answers
168 views
Mathpad alternative
I was looking for some kind of a plotter, graphic calculator to produce images, such as eclipse, parabola, logarithm etc. I saw one on wikipedia https://en.wikipedia.org/wiki/File:Lemniscate_of_Booth....
0
votes
0answers
535 views
Looking for a GUI calculator which has support for two zeroes and history
Most of the calculators, for e.g. mate-calc and galculator are good enough for simple needs. There are two functions which I need and want to use in the calculator -
It should have support for two ...
0
votes
2answers
174 views
Can you get something like Unity Dash--especially the instant calculator--in other distros?
In Ubuntu, Unity Dash is a lot like the Mac Spotlight: a search interface, app launcher, and, with the calculator lens (https://apps.ubuntu.com/cat/applications/unity-scope-calculator/), an instant ...
0
votes
1answer
1k views
Unix command to return maximum float value out of two after subtraction
This is similar to question about getting the minimum/maximum of two numbers, but I'm interested to do the same with float numbers.
So basically I'm trying to use shell arithmetic expansion using the ...
17
votes
4answers
22k views
2
votes
2answers
1k views
How to use the result from last calculation in a new calculation in wcalc?
In wcalc how can I do something like
-> 1+2
= 3
-> X+1
= 4
where X equals the result of the last calculation (that is 3)?
5
votes
3answers
1k views
dc unix : preserving initial value even after storing new value at the same array index
I'm unable to understand this example given in manpage of dc:
$ dc
1 0:a 0Sa 2 0:a La 0;ap
1
To me answer should be 2 because:
1 0:a
Here we store 1 at 0th position of array a.
0Sa
Now ...
1
vote
2answers
105 views
Any way to customize the initialization of variables in the bc calculator?
The bc calculator appears to assign uninitialized variables the value of zero. I would like to alter this behavior so that when bc encounters an uninitialized variable, it instead flags the expression ...
2
votes
5answers
4k views
bc scale: How to avoid rounding? (Calculate small binomial probability)
Following code calculates the Binomial Probability of a success event k out of n trials:
n=144
prob=$(echo "0.0139" | bc)
echo -e "Enter no.:"
read passedno
k=$passedno
nCk2() {
num=1
den=...
2
votes
1answer
597 views
calendar to check the date and then search 3 months back and add up the days of those months
I want to use the cal command or the date command to display the current day,
then I want it to display 3 months before the current date,
then add up all the days in those 3 months up to the current ...
37
votes
4answers
26k views
How is bc different from dc?
What are the differences between dc and bc calculators?
When should I use dc and when bc?
6
votes
2answers
1k views
how to add command line calculator to bash that uses comma as decimal mark?
How can I add a command line calculator to my bash? I have found some, but all of them use the full stop as decimal mark, but I want to have it to use the comma as decimal mark as most of the world ...
4
votes
1answer
605 views
Perform calculation in hex with Qalculate
I'm trying to do hex calculations, C - A, and I already changed number base to hex, but Qalculate still doesn't work.
0
votes
1answer
115 views
Where are the variables stored for mate-calc?
I know that there's no way to delete them by default in the application, but they have to be stored somewhere? I'm pretty handy with the command line, so I can do some such there.
I believe that ...
12
votes
3answers
14k views
BC—automatic full precision multiplication
High, I need to test my arbitrary precision calculator, and bc seems like a nice yardstick to compare to, however, bc does truncate the result of each multiplication to what seems to be the maximum ...
4
votes
1answer
5k views
Installing Linux on the TI-nspire
I am having trouble installing Linux on my TI-nspire cx cas graphing calculator.
I downloaded the files and the Linux image. I have read several websites on the topic but it was not that much help, ...
13
votes
4answers
75k views
Calculate variable, and output it to another variable
The only calculator I know is bc. I want to add 1 to a variable, and output to another variable.
I got the nextnum variable from counting string in a file:
nextnum=`grep -o stringtocount file.tpl....
24
votes
1answer
26k views
Does bc support hex calculations?
I'm trying to do a hex calculation directly with bc, I already specified the scale.
echo 'scale=16;c06b1000-c06a5e78' | bc
But I still get a zero. What could be wrong?
19
votes
6answers
13k views
bc doesn't support log and factorial calculation?
Is there any other command line calculator that supports log, n! calculations ? At least bc can't do that, it told me parse error
It's best if I could use script, e.g echo '5!' | program
349
votes
17answers
462k views
How to do integer & float calculations, in bash or other languages/frameworks?
Using echo "20+5" literally produces the text "20+5".
What command can I use to get the numeric sum, 25 in this case?
Also, what's the easiest way to do it just using bash for floating
point? For ...
3
votes
1answer
350 views
Make screenshots of Ti-calculator screen
I want to connect a TI-84 Plus Calculator to my PC and take screenshots of the calculator display. Under windows this is possible using the TI-connect software. However is there also a way to do this ...
