beginner: writing a function for code

what would this be in writing a function called "event detection algorithm"

 %%2.2 Calculation of Jump Height Data
        % make the data positive, set a threshold (including noise) for
        % baseline. tnf = total number of frames
        % =================================================================
        fz = -data(:,1);                                                                                                      
        fzmin= min(fz);                                                    
        fzthres= fzmin+5+n;                                                %%sets threshold 
        to= find(fz<fzthres,1,'first');                                    %%take-off
        td= find(fz(to:end)>fzthres,1,'first');                            %%touch-down
        td= td+to -1;                                          %%point of landing, global number
        tnf= (td-to);                                                      %%jumper in the air
        tof= (tnf*fr);                                                     %%time of flight eq
        jh(i,1)=(-g*(tof.^2)/8);                                    %%jump height eq
        fzminMN = nanmean(fz(to:td));                                %%mean min across time part
        fz= fz + abs(fzminMN);

Answer 1

[Image Analyst]

I would call this just "a chunk of code" though some people may use different terminology. Why do you ask?

[Adrienne]

I was just thinking, about how I could make my code look neater, and I heard someone talk about user functions. I understand the simple ones, but this one wouldn't be simple. I know the end result it jump height (jt)

          fz = -data(:,1);                                                                                                      
          fzmin= min(fz);                                                    
          fzthres= fzmin+5+n;                %%sets threshold 
          to= find(fz<fzthres,1,'first');    %%take-off
          td= find(fz(to:end)>fzthres,1,'first');   %%touchdown

I know this are^^^ all inputs then tof, tnf, and jh are the outputs with jh being the overall desired output but I have no idea of how to put this into a function.

[Image Analyst]

Sure, you can wrap up any chunk of code into a function if you want. See this link for more ideas : http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab

[Adrienne]

I was just thinking, about how I could make my code look neater, and I heard someone talk about user functions. I understand the simple ones, but this one wouldn't be simple. I know the end result it jump height (jt)

          fz = -data(:,1);                                                                                                      
          fzmin= min(fz);                                                    
          fzthres= fzmin+5+n;                %%sets threshold 
          to= find(fz<fzthres,1,'first');    %%take-off
          td= find(fz(to:end)>fzthres,1,'first');   %%touchdown

I know this are^^^ all inputs then tof, tnf, and jh are the outputs with jh being the overall desired output but I have no idea of how to put this into a function.

[Adrienne]

sorry my internet is dodgy atm!