better than if else conditions

I would like to give a tag to a number based on in which region it lies. I am currently using an if else condition. Wondering if there is an easier way.

Note: the intervals are not equal.

Here is the code:

    for i = 1:length(data_rot(:,1))
    check = acos(data_rot(i,6));

    if check >= 0 && check <.6435
        tagsPhi(i,1) = 1;
    elseif check >= .6435 && check <.9273
        tagsPhi(i,1) = 2;
    elseif check >= .9273 && check <1.1593
        tagsPhi(i,1) = 3;
    elseif check >= 1.1593 && check <1.3694
        tagsPhi(i,1) = 4;
    elseif check >= 1.3694 && check <1.5708
        tagsPhi(i,1) = 5;
    elseif check >= 1.5708 && check <1.7722
        tagsPhi(i,1) = 6;
    elseif check >= 1.7722 && check <1.9823
        tagsPhi(i,1) = 7;
    elseif check >= 1.9823 && check <2.2143
        tagsPhi(i,1) = 8;
    elseif check >= 2.2143 && check <2.4981
        tagsPhi(i,1) = 9;
    else
        tagsPhi(i,1) = 10;
    end
    end

Answer 1

[Bruno Luong]

...
edges= [0,.6435,.9273,1.1593,1.3694,1.570,1.7722,1.9823,2.2143,2.4981,Inf];
[~,~,tagsPhi] = histcounts(check,edges)

Answer 2

[John D'Errico]

Look at the third output argument from the function histcounts. It does everything you need, in a fully vectorized form. Yes, I suppose it is not fully obvious you should have known to have looked there. Older releases of MATLAB would use histc.