How do I multiply a column in a matrix by a range of values?

So I've attached my code below, what I want to do is hopefully fairly self-explanitory but I don't know if it can be done or not... I was to multiply the third column in the latin hypercube sample by a range from -12 to +30 in order to get values for the Spark range. I started off thinking I would just use 42 (the difference between the two numbers but this doesn't give me the data I need (obviously) so now I'm not sure how to solve this.... I'm doing a module for uni that involved a lot of coding and I have no experience at all with Matlab so all answers need to be explained please!!! :)

sfd = lhsdesign(100,3); %Creates a Latin Hypercube sample of 100 points with 3 variables
speed_pts = sfd(:,1)*4000; %Separates sample out into columns and assigns engine speed to column 1. Engine speed is set at 4000
load_pts = sfd(:,2)*1.5; %Assigns load to column 2. Load is set at 1.5 
spark_pts = sfd(:,3)*[-12:30]; %Assigns spark range to column 3. Spark range is set from -12 to +30

All help is greatly appreciated!!

Answer 1

[Star Strider]

I am not at all certain what result you want.

Try these:

spark_rng = linspace(-12, 30, numel(sfd(:,3)));                     % Spark Range Vector
spark_pts = sfd(:,3) .* spark_rng';                                 % Linear

spark_pts = sfd(:,3) .* spark_rng(randperm(numel(sfd(:,3))))';      % Random

They create ‘spark_rng’ as a (100x1) vector linearly spanning (-12,30), then either uses that directly or randomises it, then multiplies that (linear or random) vector by ‘sfd(:,3)’.

If this is not what you want (I am guessing here), please provide more details.