All Questions
155 questions
1
vote
1
answer
115
views
Multiple polynomial regression in C#
So I need to fit some vectorized data into a 3rd degree polynomial, however I can't find any libraries in C# that are able to do that.
Essentially, x is a vector with 3 elements ([R, G, B]), and the ...
2
votes
3
answers
100
views
Find occurrence of YYYYmmDD date in variable string
Suppose I have a string containing dates in YYYYmmDD format but in variable position and containing also other numeric sequences
For example:
xx12x20240113yyyy123zzzz
20240201xxxx34yyy
...
- 21
1
vote
1
answer
527
views
Excel scientific notation converting numeric value to E+ characters
Excel scientific notation converting numeric value to E+ characters. How to handle this in excel parcing in c#? im expecting it as string value.for example my input is '123456789012345678901234567890' ...
- 57
0
votes
1
answer
80
views
Numerics BigInteger.Remainder (Mod) doesn't work with negative divisors
Consider the following equations:
10 % 3 = 1
10 % -3 = -2
10001 % 30 = 11
10001 % -30 = -19
C#'s System.Numerics.BigInteger Seems to produce positive results for negative divisors, as if ...
- 42.5k
2
votes
1
answer
218
views
Are vectors and matrices reference or value types? Math.Net Numerics
Excuse my ignorance, but are vectors and matrices reference or value types? Not sure if that makes a difference, but I am referring to those created from an array?
I tried to look it up online quickly,...
- 89
0
votes
0
answers
75
views
C# is value part of Enum [duplicate]
I found an edge case for enum values and want to know whether there is a solution for that problem in .net5
I´ve got the following enum:
public enum SomeEnum : ushort
{
FirstValue = 0x9D80,
...
- 901
0
votes
1
answer
478
views
Clear numerical Textbox and send Value - C# Selenium
I have a numerical Textfield.
I can fill this Textfield with Sendkeys ...
This is the HTML Code.
HTML-Code:
<input class="form-control busy-disabled"
id="entry-lots"
type="number"
value="1" ...
- 89
1
vote
2
answers
2k
views
How to solve the Galaxy numeric keyboard nightmare
I've been struggling with the Samsung Galaxy numeric keyboard decimal separator nightmare.
I have an Entry on which I must only accept numeric values (including decimals), so in my xaml code I wrote &...
- 714
-3
votes
2
answers
186
views
Merge 2 Numeric strings Alternatively every Nth place [closed]
I have 2 Numeric strings with commas:
8,1,6,3,16,9,14,11,24,17,22,19
and
2,7,4,5,10,15,12,13,18,23,20,21
and I need to merge them Alternatively every Nth place
(for Example every 4th place to get)
8,1,...
- 55
0
votes
1
answer
97
views
Input string was not in a correct format wtih cm.Parameters.AddWithValue
I got this error message : input string was not in a correct format
It throws this error message at these two codes:
cm.Parameters.AddWithValue("@price", double.Parse(frmCancelDetails....
- 113
-2
votes
1
answer
966
views
Why does (float.MaxValue / float.MinValue) evaluate to Infinity?
Consider the following code and results:
double min = (double) float.MinValue;
double max = (double) float.MaxValue;
double epsilon = (double) float.Epsilon;
double range = max - min;
double delta = ...
- 14.8k
0
votes
1
answer
190
views
Intersection of 2 lines - numerical analysis
I have 2 two-dimensional arrays that represent 2 lines/curves, something like:
(y1,t1) (y2,t2) ... (yN, tN)
and
(Y1, t1) (Y2, t2) ... (YN, tN)
My goal is to find the last point from the beginning of ...
- 339
0
votes
1
answer
261
views
Increment/Decrement value from NumericUpDown
I have the following problem. I create a form with two NumericUpDown and I want to increment/decrement the value from them by 0.01. I tried to use NumericUpDownObject.Increment=0.01M, but there is no ...
- 31
0
votes
1
answer
122
views
Why does the Azure SQL Server store and display numbers but not exchange them with C#?
Column datatype
As seen in SSMS "edit top 200 rows"
As returned from a SELECT statement
decimal(29, 26)
< Unable to read data >
-795.00000000000000000000000000
decimal(29, 26)
-790....
- 1,033
2
votes
2
answers
593
views
Why am I getting a system overflow using big integer (System.Numerics)?
I am getting this error: System.OverflowException: 'The value is not a number.'
I was under the impression that big integer could store any sized value (500 ^ 500 in this case), so I don't understand ...
- 31