# Generation of random number which needs to be passed to an array Classic List Threaded 11 messages Open this post in threaded view
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## Generation of random number which needs to be passed to an array

 I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this?
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## Re: Generation of random number which needs to be passed to an array

 On Mon, Jun 15, 2020 at 4:33 PM Ganesh Kini <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this? I am not sure what you want, but this might help.a=-.2:.1:2.2;b=-3.2:.1:.2;r1=randi(numel(a))r2=randi(numel(b))c=[a(r1) , b(r2)]-- DAS Open this post in threaded view
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## Re: Generation of random number which needs to be passed to an array

 Thank youI can i iterate all the values without using for loop,SInce there are many combinations I want to avoid for loopOn Mon, Jun 15, 2020 at 10:44 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:33 PM Ganesh Kini <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this? I am not sure what you want, but this might help.a=-.2:.1:2.2;b=-3.2:.1:.2;r1=randi(numel(a))r2=randi(numel(b))c=[a(r1) , b(r2)]-- DAS Open this post in threaded view
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## Re: Generation of random number which needs to be passed to an array

 Sorry, Autocorrect!How can I iterate all the values without using for loop?Since there are many combinations I want to avoid for loop. Please let me knowOn Mon, Jun 15, 2020 at 10:47 PM Ganesh Kini <[hidden email]> wrote:Thank youI can i iterate all the values without using for loop,SInce there are many combinations I want to avoid for loopOn Mon, Jun 15, 2020 at 10:44 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:33 PM Ganesh Kini <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this? I am not sure what you want, but this might help.a=-.2:.1:2.2;b=-3.2:.1:.2;r1=randi(numel(a))r2=randi(numel(b))c=[a(r1) , b(r2)]-- DAS Open this post in threaded view
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## Re: Generation of random number which needs to be passed to an array

 In reply to this post by GK19 Maybe this helps:Kind regards,RenatoOn Mon, 15 Jun 2020, 21:33 Ganesh Kini, <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this?
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## Re: Generation of random number which needs to be passed to an array

 In reply to this post by GK19 On Mon, Jun 15, 2020 at 4:55 PM Ganesh Kini <[hidden email]> wrote:Sorry, Autocorrect!How can I iterate all the values without using for loop?Since there are many combinations I want to avoid for loop. Please let me knowOn Mon, Jun 15, 2020 at 10:47 PM Ganesh Kini <[hidden email]> wrote:Thank youI can i iterate all the values without using for loop,SInce there are many combinations I want to avoid for loopOn Mon, Jun 15, 2020 at 10:44 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:33 PM Ganesh Kini <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this? I am not sure what you want, but this might help.a=-.2:.1:2.2;b=-3.2:.1:.2;r1=randi(numel(a))r2=randi(numel(b))c=[a(r1) , b(r2)]-- DAS In your first question you hat the word "random" so I thought you wanted a random choice , in the range. Now I see that you don't wand random.So what do you want? Just a set of all possible combinations? do you know how big that will be?-- DAS Open this post in threaded view
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## Re: Generation of random number which needs to be passed to an array

 I want all the sets of randomly mixed values of A and B and then I need to iterate themSo, there are two questions 1) How do I randomly pick one set of A and B and then pass it on the array?2) How do I iterate all the sets of values without using for loop?  On Mon, Jun 15, 2020 at 11:29 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:55 PM Ganesh Kini <[hidden email]> wrote:Sorry, Autocorrect!How can I iterate all the values without using for loop?Since there are many combinations I want to avoid for loop. Please let me knowOn Mon, Jun 15, 2020 at 10:47 PM Ganesh Kini <[hidden email]> wrote:Thank youI can i iterate all the values without using for loop,SInce there are many combinations I want to avoid for loopOn Mon, Jun 15, 2020 at 10:44 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:33 PM Ganesh Kini <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this? I am not sure what you want, but this might help.a=-.2:.1:2.2;b=-3.2:.1:.2;r1=randi(numel(a))r2=randi(numel(b))c=[a(r1) , b(r2)]-- DAS In your first question you hat the word "random" so I thought you wanted a random choice , in the range. Now I see that you don't wand random.So what do you want? Just a set of all possible combinations? do you know how big that will be?-- DAS Open this post in threaded view
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## Re: Generation of random number which needs to be passed to an array

 On Mon, Jun 15, 2020 at 5:43 PM Ganesh Kini <[hidden email]> wrote:I want all the sets of randomly mixed values of A and B and then I need to iterate themSo, there are two questions 1) How do I randomly pick one set of A and B and then pass it on the array?2) How do I iterate all the sets of values without using for loop?  On Mon, Jun 15, 2020 at 11:29 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:55 PM Ganesh Kini <[hidden email]> wrote:Sorry, Autocorrect!How can I iterate all the values without using for loop?Since there are many combinations I want to avoid for loop. Please let me knowOn Mon, Jun 15, 2020 at 10:47 PM Ganesh Kini <[hidden email]> wrote:Thank youI can i iterate all the values without using for loop,SInce there are many combinations I want to avoid for loopOn Mon, Jun 15, 2020 at 10:44 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:33 PM Ganesh Kini <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this? I am not sure what you want, but this might help.a=-.2:.1:2.2;b=-3.2:.1:.2;r1=randi(numel(a))r2=randi(numel(b))c=[a(r1) , b(r2)]-- DAS In your first question you hat the word "random" so I thought you wanted a random choice , in the range. Now I see that you don't wand random.So what do you want? Just a set of all possible combinations? do you know how big that will be?-- DAS This looks like homework.I don't do homework questions.I did show you how to do part of your question, and now I am out!-- DAS Open this post in threaded view
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## Re: Generation of random number which needs to be passed to an array

 No sir, It is not. I can pass it via for loop but I don't want to take that approach.Kindly let me knowOn Tue, Jun 16, 2020 at 12:21 AM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 5:43 PM Ganesh Kini <[hidden email]> wrote:I want all the sets of randomly mixed values of A and B and then I need to iterate themSo, there are two questions 1) How do I randomly pick one set of A and B and then pass it on the array?2) How do I iterate all the sets of values without using for loop?  On Mon, Jun 15, 2020 at 11:29 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:55 PM Ganesh Kini <[hidden email]> wrote:Sorry, Autocorrect!How can I iterate all the values without using for loop?Since there are many combinations I want to avoid for loop. Please let me knowOn Mon, Jun 15, 2020 at 10:47 PM Ganesh Kini <[hidden email]> wrote:Thank youI can i iterate all the values without using for loop,SInce there are many combinations I want to avoid for loopOn Mon, Jun 15, 2020 at 10:44 PM Doug Stewart <[hidden email]> wrote:On Mon, Jun 15, 2020 at 4:33 PM Ganesh Kini <[hidden email]> wrote:I have 2 variables named A and BA  has the range from -0.2 to 2.2 B has the range from  -3.2 to 0.2I need all the possible to combinations of A and B in 0.1 stepsfor example A                        B0.1                  0.2-0.1               -0.3 and so on How do I randomly generate this? I am not sure what you want, but this might help.a=-.2:.1:2.2;b=-3.2:.1:.2;r1=randi(numel(a))r2=randi(numel(b))c=[a(r1) , b(r2)]-- DAS In your first question you hat the word "random" so I thought you wanted a random choice , in the range. Now I see that you don't wand random.So what do you want? Just a set of all possible combinations? do you know how big that will be?-- DAS This looks like homework.I don't do homework questions.I did show you how to do part of your question, and now I am out!-- DAS On Mon, Jun 15, 2020 at 10:42 PM Nicholas Jankowski <[hidden email]> wrote:On Mon, Jun 15, 2020 at 6:25 PM Ganesh Kini <[hidden email]> wrote:No sir, It is not. I can pass it via for loop but I don't want to take that approach.Kindly let me knowas before, please post after the quoted reply, not before it. it makes it easier for readers to follow the conversation.I assume you didn't actually mean 'randomly', but you are looking for all of the combinations. What you are doing looks like the generation of a 2d coordinate mesh, given vectors A and B.  You can use the meshgrid function to make all of those combinations.>> A = 1:0.2:2;B = 10:0.2:11;[aa, bb] = meshgrid (A,B)aa =   1.0000   1.2000   1.4000   1.6000   1.8000   2.0000   1.0000   1.2000   1.4000   1.6000   1.8000   2.0000   1.0000   1.2000   1.4000   1.6000   1.8000   2.0000   1.0000   1.2000   1.4000   1.6000   1.8000   2.0000   1.0000   1.2000   1.4000   1.6000   1.8000   2.0000   1.0000   1.2000   1.4000   1.6000   1.8000   2.0000bb =   10.000   10.000   10.000   10.000   10.000   10.000   10.200   10.200   10.200   10.200   10.200   10.200   10.400   10.400   10.400   10.400   10.400   10.400   10.600   10.600   10.600   10.600   10.600   10.600   10.800   10.800   10.800   10.800   10.800   10.800   11.000   11.000   11.000   11.000   11.000   11.000Now, the positions of aa and bb give you every combination of A, B.if you want this reshaped as a single array, you could use:>> C = [aa(:), bb(:)]C =    1.0000   10.0000    1.0000   10.2000    1.0000   10.4000    1.0000   10.6000    1.0000   10.8000    1.0000   11.0000    1.2000   10.0000    1.2000   10.2000    1.2000   10.4000    1.2000   10.6000    1.2000   10.8000    1.2000   11.0000    1.4000   10.0000    1.4000   10.2000    1.4000   10.4000    1.4000   10.6000    1.4000   10.8000    1.4000   11.0000    1.6000   10.0000    1.6000   10.2000    1.6000   10.4000    1.6000   10.6000    1.6000   10.8000    1.6000   11.0000    1.8000   10.0000    1.8000   10.2000    1.8000   10.4000    1.8000   10.6000    1.8000   10.8000    1.8000   11.0000    2.0000   10.0000    2.0000   10.2000    2.0000   10.4000    2.0000   10.6000    2.0000   10.8000    2.0000   11.0000Or however else you want to manipulate the array to make it useful for you. Great answer Nicholas!Ganesh:  does this do what you want?Do you still want any randomness ? -- DAS 