Questions tagged [calculator]
The calculator tag has no usage guidance.
35
questions
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evaluate terms in zsh without a command
I am using zsh with the prezto configuration framework. I want to be able to type in terms like 1 + 2 * (3 / 4) and get "2.5" out of it.
Those terms could be recognized because they only ...
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1
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122
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How to round to the correct nearest number in Linux bc?
How do we round to the correct nearest number in a Linux basic calculator BC?
- 11
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1
answer
78
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Linux BC calculator multiple variables must be read or seen by Bash [closed]
How can linux BC calculator multiple variables, not just one obtain by command substitution, be recognized or seen by Bash
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0
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22
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Linux calculator - move result between engineering notations n x 10^-3 to say 0.00n x 10^-6
Is there a way to move between engineering notations for the result of a calculation? in any of the linux calculators, qalcalculate, gnome calculator, other?
So for instance: If want the results of a ...
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0
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49
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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 ...
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30
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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 ...
- 6,296
2
votes
2
answers
270
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 ...
- 25
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1
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379
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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 ...
- 73
1
vote
1
answer
369
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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?
54
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21
answers
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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:...
- 5,622
2
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0
answers
36
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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
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1
answer
124
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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.
- 147
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votes
4
answers
3k
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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.
- 11k
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1
answer
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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?
- 1,373
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2
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198
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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....
- 819
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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 ...
- 11k
0
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2
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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 ...
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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 ...
- 18.6k
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4
answers
28k
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2
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2
answers
1k
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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)?
- 1,147
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votes
3
answers
1k
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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 ...
- 186
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vote
2
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141
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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 ...
- 121
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5
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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=...
- 165
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1
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958
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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 ...
- 93
49
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4
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How is bc different from dc?
What are the differences between dc and bc calculators?
When should I use dc and when bc?
- 11.4k
6
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2
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2k
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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 ...
- 16.1k
4
votes
1
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699
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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.
- 51.2k
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116
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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 ...
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votes
3
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BC—automatic full precision multiplication [duplicate]
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 ...
- 26.5k
4
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1
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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, ...
- 432
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4
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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....
- 1,857
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1
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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?
- 51.2k
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6
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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 produced a parse error.
It's best if I could use it in a script, e.g echo '5!' | program.
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393
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17
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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 ...
- 38.5k
3
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1
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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 ...
- 16.9k