lily asked . 2023-04-03

Check which range an upper & lower limit lies within

Hi,

I have a set of horizontal coordinates (Y1 and Y2) which define a rectangle. Y1 defines the LHS top edge point & Y2 the RHS bottom edge point (see image). I also have a table (T) which has the horizontal location of each section of a planform. For example:

Y1 = 3.4;
Y2 = 7.1; 
T = table([0.1, 0.75, 3.0, 8.2, 9.1]); 
T = rename vars(T, T.Properties.VariableNames, ["L1", "L2", "L3", "L4", "L5"]);

I want to see which range (e.g. L1-L2, L2-L3......) Y1 and Y2 (i.e the rectangle) lies in (Y1 is the lower limit and Y2 is the upper limit). So for this example, I know the rectange is between L3 and L4 but I want the code to tell me this. upper & lower limit lies

I am stuck on how to code this. Any suggestions will be appreciated.

matlab , range , Language Fundamentals , Numeric Types , Logical

Expert Answer

Prashant Kumar answered . 2024-12-21 15:52:39

Hi,

I would recommand using a cell object instead of table, or a matrix depending on your needs, as shown below :

Y1 = 3.4;
Y2 = 7.1; 
T = {0.1, 0.75, 3.0, 8.2, 9.1}

T = 1×5 cell array
    {[0.1000]}    {[0.7500]}    {[3]}    {[8.2000]}    {[9.1000]}

Tmat = horzcat(-inf,cell2mat(T),inf) ; % -inf and inf are here to tell your limits are out of L bounds
Y = [Y1,Y2] ;
Range = cell(1,length(Y)) ;
for i = 1:length(Y)
    for k = 1:length(T)-1
        if T{k} < Y(i) & T{k+1} > Y(i) ;
            Range{i} = [T{k},T{k+1}] ;
        end
    end
end
Range

Range = 1×2 cell array
    {[3 8.2000]}    {[3 8.2000]}

This is coded in a horrible way and I'm sure there are better ways to do it, but if I'm not mistaken this is what you needed.

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