You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: initdesign_vbmc.m
    path of file: ./repos/vbmc/misc
    
    the code of the file until where you have to start completion: function [optimState,t_func] = initdesign_vbmc(optimState,Ns,funwrapper,t_func,options)
%INITDESIGN_VBMC Initial sample design (provided or random box).

x0 = optimState.Cache.X_orig;
[N0,D] = size(x0);

if N0 <= Ns
    Xs = x0;
    ys = optimState.Cache.y_orig;
    if N0 < Ns
        switch lower(options.InitDesign)
            case 'plausible'
                % Uniform random samples in the plausible box (in transformed space)

    
function [optimState,t_func] = initdesign_vbmc(optimState,Ns,funwrapper,t_func,options)
%INITDESIGN_VBMC Initial sample design (provided or random box).

x0 = optimState.Cache.X_orig;
[N0,D] = size(x0);

if N0 <= Ns
    Xs = x0;
    ys = optimState.Cache.y_orig;
    if N0 < Ns
        switch lower(options.InitDesign)
            case 'plausible'
                % Uniform random samples in the plausible box (in transformed space)
                Xrnd = bsxfun(@plus,bsxfun(@times,rand(Ns-N0,D),optimState.PUB-optimState.PLB),optimState.PLB);
            case 'narrow'
                xstart = warpvars_vbmc(x0(1,:),'dir',optimState.trinfo);
                Xrnd = bsxfun(@plus,bsxfun(@times,rand(Ns-N0,D)-0.5,0.1*(optimState.PUB-optimState.PLB)),xstart);
                Xrnd = bsxfun(@min,bsxfun(@max,Xrnd,optimState.PLB),optimState.PUB);
            otherwise
                error('Unknown initial design for VBMC.');
        end