How to create a for loop?

Question

Eveline Kallenberg 2020-2-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503180-how-to-create-a-for-loop

评论： Star Strider 2020-2-3

采纳的回答： Star Strider

PP1_TOJ.mat

在 MATLAB Online 中打开

Hi all,

I have this code beneath and I am wondering if and how I could put this in a for loop in order to only have a code of about 5 lines or so?

Thanks in advance!

%% 1. Data laden
load('PP1_TOJ.mat');
%% SOA -350ms
responsemin350=Data(Data(:,3)==-350,[3 6]);
xmin350=(responsemin350==80);
soundfirstmin350=sum(xmin350, 'all');
ymin350=(responsemin350==79);
lightfirstmin350=sum(ymin350, 'all');
soundfirstmin350(soundfirstmin350==0)=1;
lightfirstmin350(lightfirstmin350==0)=1;
proportionlightfirstmin350=lightfirstmin350/20
%% SOA -250ms
responsemin250=Data(Data(:,3)==-250,[3 6]);
xmin250=(responsemin250==80);
soundfirstmin250=sum(xmin250, 'all');
ymin250=(responsemin250==79);
lightfirstmin250=sum(ymin250, 'all');
soundfirstmin250(soundfirstmin250==0)=1;
lightfirstmin250(lightfirstmin250==0)=1;
proportionlightfirstmin250=lightfirstmin250/20
%% SOA -150ms
responsemin150=Data(Data(:,3)==-150,[3 6]);
xmin150=(responsemin150==80);
soundfirstmin150=sum(xmin150, 'all');
ymin150=(responsemin150==79);
lightfirstmin150=sum(ymin150, 'all');
soundfirstmin150(soundfirstmin150==0)=1;
lightfirstmin150(lightfirstmin150==0)=1;
proportionlightfirstmin150=lightfirstmin150/20
%% SOA -50ms
responsemin50=Data(Data(:,3)==-50,[3 6]);
xmin50=(responsemin50==80);
soundfirstmin50=sum(xmin50, 'all');
ymin50=(responsemin50==79);
lightfirstmin50=sum(ymin50, 'all');
soundfirstmin50(soundfirstmin50==0)=1;
lightfirstmin50(lightfirstmin50==0)=1;
proportionlightfirstmin50=lightfirstmin50/20
%% SOA 0ms
response0=Data(Data(:,3)==0,[3 6]);
x0=(response0==80);
soundfirst0=sum(x0, 'all');
y0=(response0==79);
lightfirst0=sum(y0, 'all');
soundfirst0(soundfirst0==0)=1;
lightfirst0(lightfirst0==0)=1;
proportionlightfirst0=lightfirst0/20
%% SOA +50ms
responseplus50=Data(Data(:,3)==50,[3 6]);
xplus50=(responseplus50==80);
soundfirstplus50=sum(xplus50, 'all');
yplus50=(responseplus50==79);
lightfirstplus50=sum(yplus50, 'all');
soundfirstplus50(soundfirstplus50==0)=1;
lightfirstplus50(lightfirstplus50==0)=1;
proportionlightfirstplus50=lightfirstplus50/20
%% SOA +150ms
responseplus150=Data(Data(:,3)==150,[3 6]);
xplus150=(responseplus150==80);
soundfirstplus150=sum(xmin150, 'all');
yplus150=(responseplus150==79);
lightfirstplus150=sum(yplus150, 'all');
soundfirstplus150(soundfirstplus150==0)=1;
lightfirstplus150(lightfirstplus150==0)=1;
proportionlightfirstplus150=lightfirstplus150/20
%% SOA +250ms
responseplus250=Data(Data(:,3)==250,[3 6]);
xplus250=(responseplus250==80);
soundfirstplus250=sum(xplus250, 'all');
yplus250=(responseplus250==79);
lightfirstplus250=sum(yplus250, 'all');
soundfirstplus250(soundfirstplus250==0)=1;
lightfirstplus250(lightfirstplus250==0)=1;
proportionlightfirstplus250=lightfirstplus250/20
%% SOA +350ms
responseplus350=Data(Data(:,3)==350,[3 6]);
xplus350=(responseplus350==80);
soundfirstplus350=sum(xplus350, 'all');
yplus350=(responseplus350==79);
lightfirstplus350=sum(yplus350, 'all');
soundfirstplus350(soundfirstplus350==0)=1;
lightfirstplus350(lightfirstplus350==0)=1;
proportionlightfirstplus350=lightfirstplus350/20

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Answer 1

Star Strider 2020-2-1

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503180-how-to-create-a-for-loop#answer_413282

在 MATLAB Online 中打开

Try this:

D = load('PP1_TOJ.mat');
Data = D.Data;
V = [-350:100:150 -50:50:50 150:100:350];
for k = 1:numel(V)
    responsemin{k,:} = Data(Data(:,3)==V(k),[3 6]);
    soundfirstmin{k,:} = sum(responsemin{k}==80, 'all');
    lightfirstmin{k,:}=sum(responsemin{k}==79, 'all');
    soundfirstmin{k,:}(soundfirstmin{k}==0)=1;
    lightfirstmin{k,:}(lightfirstmin{k}==0)=1;
    proportionlightfirstmin{k,:}=lightfirstmin{k}/20;
end

The results are each (12x1) cell arrays. The ‘k’ subscripts correspond to the elements of ‘V’.

6 个评论
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Eveline Kallenberg 2020-2-3

Sorry, but I have very little experience in coding so I have no idea what you are saying haha sorry! Could you maybe give an example with code?

Rik 2020-2-3

在 MATLAB Online 中打开

soundfirst{k,:}=sum(response{k}==80, 'all');
%                           ^ ^
%                      not  (k)
%and before your loop:
response={};
lightfirst={};
soundfirst={};

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Answer 2

Eveline Kallenberg 2020-2-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503180-how-to-create-a-for-loop#answer_413493

在 MATLAB Online 中打开

Thanks everyone for your time to try to help me! Ultimately, I figured it out and my code can be found below.

%% 1. Loading data
D=load('PP1_TOJ.mat');
Data=D.Data;
%% 2. For loop with SOA's
SOAs = [-350 -250 -150 -50 0 50 150 250 350];
for k = 1:numel(SOAs)
    response(:,:)=Data(Data(:,3)==SOAs(k),[3 6]);
    soundfirst(k)=sum(response(:,2)==80, 'all');
    lightfirst(k)=sum(response(:,2)==79, 'all');
    proportionlightfirst(k)=lightfirst(k)/20;
end