Difference between revisions of "TI-BASIC:Number To String"
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{{Template:TI-BASIC:Routine | {{Template:TI-BASIC:Routine | ||
| − | |picture= | + | |picture= |
|summary=Converts a real number to a string. | |summary=Converts a real number to a string. | ||
|input=''N'' - the number you want to convert | |input=''N'' - the number you want to convert | ||
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|variable=L₁, L₂, Y₁, Str1, N | |variable=L₁, L₂, Y₁, Str1, N | ||
|compatibility=TI-83/84/+/SE | |compatibility=TI-83/84/+/SE | ||
| − | |author= | + | |author= |
| − | |authors= | + | |authors= |
| − | |url= | + | |url= |
|download=[file numbertostring.zip] | |download=[file numbertostring.zip] | ||
}} | }} | ||
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:sub(Str1,1,length(Str1)-3→Str1 | :sub(Str1,1,length(Str1)-3→Str1 | ||
| − | This code works because it creates two points with a known best fit line: the best fit line through (0,0) and (1,N) is y=Nx+0. [[TI-BASIC: | + | This code works because it creates two points with a known best fit line: the best fit line through (0,0) and (1,N) is y=Nx+0. [[TI-BASIC:Linreg_Ax_B|LinReg(ax+b)]] calculates this best fit line, and stores its equation to Y₁. |
Then, we use [[TI-BASIC:Equ►String(|Equ►String(]] to store this equation to Str1, which now contains "NX+0" with N replaced by the numerical value of N. After that, the [[TI-BASIC:Sub|Sub(]] command get rids of the "X+0" at the end, leaving only the string representation of N. | Then, we use [[TI-BASIC:Equ►String(|Equ►String(]] to store this equation to Str1, which now contains "NX+0" with N replaced by the numerical value of N. After that, the [[TI-BASIC:Sub|Sub(]] command get rids of the "X+0" at the end, leaving only the string representation of N. | ||
Latest revision as of 23:22, 24 February 2016
Routine Summary
Converts a real number to a string.
Inputs
N - the number you want to convert
Outputs
Str1 - the number N in string form
Variables Used
L₁, L₂, Y₁, Str1, N
Calculator Compatibility
TI-83/84/+/SE
Download
:{0,1→L₁
:{0,N→L₂
:LinReg(ax+b) Y₁
:Equ►String(Y₁,Str1
:sub(Str1,1,length(Str1)-3→Str1
This code works because it creates two points with a known best fit line: the best fit line through (0,0) and (1,N) is y=Nx+0. LinReg(ax+b) calculates this best fit line, and stores its equation to Y₁.
Then, we use Equ►String( to store this equation to Str1, which now contains "NX+0" with N replaced by the numerical value of N. After that, the Sub( command get rids of the "X+0" at the end, leaving only the string representation of N.
This routine uses L₁, L₂, and Y₁, so you should clean up those variables at the end of your program. If you're working with the graph screen in function mode, storing to Y₁ can be a problem since it will draw an unwanted line through your graphics. Use r₁ instead but make sure the calculator isn't in polar mode.
Note: This only works for real numbers. With complex numbers, such as imaginary numbers, you can use this code at the end of the first to get the same effect with i in it.
:Str1+"i"→Str1
