MATLAB: How to work on “for loop” to save different column variable values to single vector

for loop

My question is=>
i have two variables, Ea and Ed, Ea contains single value and Ed contains 4 values like this,
Ea=10.5
Ed=51.6149 27.1981 13.2580 2.3396
These are wave energy values for 1 second of audio clip. But i have to calculate energy values for 60 seconds. So i have done storing each energy values in different variables like, Ed1, Ed2, Ed3…Ed60. These are Ed values for 60 seconds.
Now the problem i ve got is=>
i want to store all 1st column values of each variable(Ed1,Ed2,Ed3 till Ed60) in one vector(VEd1,VEd2,VEd3 and VEd4), so that i can draw or plot graph to analyze.
Here VEd1 should contain only 1st column values of all Ed values and also VEd2, VEd3 and VEd4.
I have tried "for" loop but could not get how to do tat… If i wont use any loops here, i wont b able to finish this before my dead line as i have to train the module for different audios.
Here is whatever i have tried… but i got errors…
 for i=1:60,
    VEa=Ea(i);
 end
 ERROR: Attempted to access Ea(2); index out of bounds because numel(Ea)=1.
then tried=>
 for i=1:60,
    VEa=Ea.i;
 end
 ERROR: Attempt to reference field of non-structure array.
Then i satisfied with this=>
 for i=1,
    VEd1=[Ed1(i) Ed2(i) Ed3(i) Ed4(i) Ed5(i) Ed6(i) Ed7(i) Ed8(i) Ed9(i) Ed10(i) Ed11(i) Ed12(i) Ed13(i) Ed14(i) Ed15(i) Ed16(i) Ed17(i) Ed18(i) Ed19(i) Ed20(i) Ed21(i) Ed22(i) Ed23(i) Ed24(i) Ed25(i) Ed26(i) Ed27(i) Ed28(i) Ed29(i) Ed30(i) Ed31(i) Ed32(i) Ed33(i) Ed34(i) Ed35(i) Ed36(i) Ed37(i) Ed38(i) Ed39(i) Ed40(i) Ed41(i) Ed42(i) Ed43(i) Ed44(i) Ed45(i) Ed46(i) Ed47(i) Ed48(i) Ed49(i) Ed50(i) Ed51(i) Ed52(i) Ed53(i) Ed54(i) Ed55(i) Ed56(i) Ed57(i) Ed58(i) Ed59(i) Ed60(i)];
 end
 for i=2,
   VEd2=[Ed1(i) Ed2(i) Ed3(i) Ed4(i) Ed5(i) Ed6(i) Ed7(i) Ed8(i) Ed9(i) Ed10(i) Ed11(i) Ed12(i) Ed13(i) Ed14(i) Ed15(i) Ed16(i) Ed17(i) Ed18(i) Ed19(i) Ed20(i) Ed21(i) Ed22(i) Ed23(i) Ed24(i) Ed25(i) Ed26(i) Ed27(i) Ed28(i) Ed29(i) Ed30(i) Ed31(i) Ed32(i) Ed33(i) Ed34(i) Ed35(i) Ed36(i) Ed37(i) Ed38(i) Ed39(i) Ed40(i) Ed41(i) Ed42(i) Ed43(i) Ed44(i) Ed45(i) Ed46(i) Ed47(i) Ed48(i) Ed49(i) Ed50(i) Ed51(i) Ed52(i) Ed53(i) Ed54(i) Ed55(i) Ed56(i) Ed57(i) Ed58(i) Ed59(i) Ed60(i)];
  end
for i=3,
   VEd3=[Ed1(i) Ed2(i) Ed3(i) Ed4(i) Ed5(i) Ed6(i) Ed7(i) Ed8(i) Ed9(i) Ed10(i) Ed11(i) Ed12(i) Ed13(i) Ed14(i) Ed15(i) Ed16(i) Ed17(i) Ed18(i) Ed19(i) Ed20(i) Ed21(i) Ed22(i) Ed23(i) Ed24(i) Ed25(i) Ed26(i) Ed27(i) Ed28(i) Ed29(i) Ed30(i) Ed31(i) Ed32(i) Ed33(i) Ed34(i) Ed35(i) Ed36(i) Ed37(i) Ed38(i) Ed39(i) Ed40(i) Ed41(i) Ed42(i) Ed43(i) Ed44(i) Ed45(i) Ed46(i) Ed47(i) Ed48(i) Ed49(i) Ed50(i) Ed51(i) Ed52(i) Ed53(i) Ed54(i) Ed55(i) Ed56(i) Ed57(i) Ed58(i) Ed59(i) Ed60(i)];
end
for i=4,
   VEd4=[Ed1(i) Ed2(i) Ed3(i) Ed4(i) Ed5(i) Ed6(i) Ed7(i) Ed8(i) Ed9(i) Ed10(i) Ed11(i) Ed12(i) Ed13(i) Ed14(i) Ed15(i) Ed16(i) Ed17(i) Ed18(i) Ed19(i) Ed20(i) Ed21(i) Ed22(i) Ed23(i) Ed24(i) Ed25(i) Ed26(i) Ed27(i) Ed28(i) Ed29(i) Ed30(i) Ed31(i) Ed32(i) Ed33(i) Ed34(i) Ed35(i) Ed36(i) Ed37(i) Ed38(i) Ed39(i) Ed40(i) Ed41(i) Ed42(i) Ed43(i) Ed44(i) Ed45(i) Ed46(i) Ed47(i) Ed48(i) Ed49(i) Ed50(i) Ed51(i) Ed52(i) Ed53(i) Ed54(i) Ed55(i) Ed56(i) Ed57(i) Ed58(i) Ed59(i) Ed60(i)];
end
NOW can u plz tel me how to do all this in a single loop?
i want to know how this all variables can be used to store the appropriate values… As in C- language its not happening here. if u know something about this plz help me… Thank you…

Best Answer

Why loop when you can just put it in a matrix? You are saying that Ed1 = [51.6149 27.1981 13.2580 2.3396] (this would be a row, but I'm assuming you have it in columns since you said you want the first value in each column of EdXX)
so assuming Edxx are column vectors:
Ed = [Ed1, Ed2, Ed3,.......,Ed60];
Then
Ved1 = Ed(1,:);
Ved2 = Ed(2,:);
Ved3 = Ed(3,:);
Ved4 = Ed(4,:);
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