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Questions tagged [lookup-tables]

A look-up table is an array or matrix of data that contains items that can be searched. Lookup tables may be arranged as key-value pairs, where the keys are the data items being searched (looked up) and the values are either the actual data or pointers to where the data are located.

A look - up table is an array or matrix of data that contains items that are searched. Lookup tables may be arranged as key-value pairs, where the keys are the data items being searched (looked up) and the values are either the actual data or pointers to where the data are located.

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Which Excel formula should I use

I have two Excel sheets. I want to copy name and address into D and E columns of sheet 1 from sheet 2 if both sex and age match. sheet 1 has three columns; case_no, age and sex sheet 2 has; no, age, sex, Address and name How can I do this using…
user8328
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Accessing data within elements of a lookup table

I have the following array, which each element contains a information that corresponds to a start value, and end value and an id (i.e. start 5, end 10 and the id being apples). var fruits = [ [5, 10, apples], [11, 15, oranges] ]; for (var…
tba
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C++: How to create an array with id,string and named constant?

I often use const lookup tables in my code, which consists of an id and a string. But for readability it would be better to use symbol names (named constants) instead of the id. Example: class LookupTable { map m { {10,"red"},…
ThomasG
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MS Access: sort, select & lookup combo

This is a question about recommended approach and syntax. I have a sports-management program in which swimmers are grouped into teams of four, with a team pace. I need Access to determine the team pace for each team based on the slowest member of…
user3529366
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Replacing colum with values from lookup table in R

I need to replace the values of a column model in ddata: > unique(ddata$model) [1] "GT-I9001" "iPhone5,2" "iPhone3,1" [4] "iPhone4,1" "GT-I9300" "Nexus 4" [7] "iPhone2,1" "VS840 4G" …
gozzilli
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Reading specific line in txt file with C

I am working with Mac OSX, programming in C and using bash in terminal. I am currently trying to make a lookup table for the gamma function. Calling gsl_sf_gamma I have been told is pretty expensive and a lookup table would be far faster. I did not…
Novice C
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How to optimze lookup table?

I am developing a TSQL query using SSMS 2008 R2 and I want to optimize this sproc that currently uses many left joins. There is a lookup table that contains one row / lookup value. So my TSQL code looks like this: Table A = main record table Table…
salvationishere
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Why LUT works wrong?

I have trouble that even neutral LUT change view not properly (totally green even black places). For example: [View without LUT] [View with neutral LUT] [Neutral LUT]. I tried to change color space, and image import settings. But without result. How…
Arficord
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how to locate a certain value within a table and extract row and column information?

Hello Stack Overflow Folks. While i'm working on my project, I encountered an excel question. if you see the chart attached above, the big table at the top is made of basically three information. first column having the value from 4~25 is the…
Soonk
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Denormalize a table that uses lookup values?

I have two tables. Table 1 is a basic "contact" style table with various personal columns. One of the fields in Table 1 is a lookup column that references Table 2. I want to either create a new column or set an empty column in Table 1 with the…
Curtis White
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Lookup tables in C++

I have to implement small multimage graphic control, which in essence is an array of 9 images, shown one by one. The final goal is to act as minislider. Now, this graphic control is going to receive various integer ranges: from 5 to 25 or from 0 to…
garzanti
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Find LFSR polynomial and create lookup table in C++

I have this LFSR and I am unsure how to find the polynomial associated with it. I am trying to create a _static _flash look up table with uint8_t variables to save on computing cycles. Only problem, I'm not sure how to implement an LFSR in…
Hearny
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Creating a function of a variable in an object from a lookup table in Go

I'm new to Go, so this is probably simple but hours of tutorials have still left me unsure. I'm running a physics simulator that deals with magnetic nanoparticles. In this simulator (vinamax), you can define the magnetic field as a function of…
egen
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How to write a multiplications table in Java?

I'm learning Java and one of the task I've been given is to code a multiplication table that show like this: 1 2 3 4 5 6 7 8 9 10 // 1 2 4 6 8 10 12 14 16 18 20 // 2 3 6 9 12 15 18 21 24 27 30 // 3 .... I'm working on it since 2…
Cheikh.S
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How to calculate sin inverse (arcsin) in VHDL?

I am using Altera De0 nano Soc FPGA, and Quartus 16.1 lite edition. After doing a search on internet, I found that to get sin, cos and atan Altera's CORDIC IP core can be used directly. And also found lookup table (LUT) can be used for sin or cos…
komto909
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