

How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.


Do you want it in the plot specifically? I don't know how to do that, but if you just want the data, then I would find out what indices the (X,Y) values correspond to, and then check the value in the matrix C with those indices. For example, if (X,Y)=(A(i),B(j)) then the value should be C(i,j).
On Fri, Jul 19, 2019 at 4:45 PM Burak Kaymakci < [hidden email]> wrote: How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.


On Fri, Jul 19, 2019 at 4:45 PM Burak Kaymakci < [hidden email]> wrote: How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.
try this
A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
h=surf(A, B, C); q=get(h) q.zdata
 DAS


Yes, Burak  I didn't mean calling C(A(1), B(2)) like you said. What I said was that you need to find which indices correspond to that X value. For example, if Y=9, then you would want to find out i such that B(i)=9. In your example, i=3. You can do this with e.g. "yindex = find(B==9)".
(Please excuse me for forgetting the transposition with surf indexed as C(j,i) there.)
On Fri, Jul 19, 2019 at 4:45 PM Burak Kaymakci < [hidden email]> wrote: How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.
try this
A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
h=surf(A, B, C); q=get(h) q.zdata
 DAS


Unfortunately, that I don't know. If you're fine with just linear interpolation, you could calculate it by hand that way, but that's the best I can suggest offhand.
By the way, please use reply all so these are sent to the mailing list too  maybe someone else will know an easy way to do this.
On Fri, Jul 19, 2019 at 5:48 PM Burak Kaymakci < [hidden email]> wrote: But what if I want an index that is not in my matrices A, and B but within the range?
Brett Green < [hidden email]>, 19 Tem 2019 Cum, 23:33 tarihinde şunu yazdı: Yes, Burak  I didn't mean calling C(A(1), B(2)) like you said. What I said was that you need to find which indices correspond to that X value. For example, if Y=9, then you would want to find out i such that B(i)=9. In your example, i=3. You can do this with e.g. "yindex = find(B==9)".
(Please excuse me for forgetting the transposition with surf indexed as C(j,i) there.)
On Fri, Jul 19, 2019 at 4:45 PM Burak Kaymakci < [hidden email]> wrote: How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.
try this
A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
h=surf(A, B, C); q=get(h) q.zdata
 DAS


Oh okay, sorry, I didn't know it is not being sent. I will do it from now on.
Thank you for the answers and the warning. :)
If I find anything, I can mail it again.
Brett Green < [hidden email]>, 20 Tem 2019 Cmt, 00:22 tarihinde şunu yazdı: Unfortunately, that I don't know. If you're fine with just linear interpolation, you could calculate it by hand that way, but that's the best I can suggest offhand.
By the way, please use reply all so these are sent to the mailing list too  maybe someone else will know an easy way to do this.
On Fri, Jul 19, 2019 at 5:48 PM Burak Kaymakci < [hidden email]> wrote: But what if I want an index that is not in my matrices A, and B but within the range?
Brett Green < [hidden email]>, 19 Tem 2019 Cum, 23:33 tarihinde şunu yazdı: Yes, Burak  I didn't mean calling C(A(1), B(2)) like you said. What I said was that you need to find which indices correspond to that X value. For example, if Y=9, then you would want to find out i such that B(i)=9. In your example, i=3. You can do this with e.g. "yindex = find(B==9)".
(Please excuse me for forgetting the transposition with surf indexed as C(j,i) there.)
On Fri, Jul 19, 2019 at 4:45 PM Burak Kaymakci < [hidden email]> wrote: How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.
try this
A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
h=surf(A, B, C); q=get(h) q.zdata
 DAS


No problem! Good luck finding a solution.
On Fri, Jul 19, 2019 at 6:25 PM Burak Kaymakci < [hidden email]> wrote: Oh okay, sorry, I didn't know it is not being sent. I will do it from now on.
Thank you for the answers and the warning. :)
If I find anything, I can mail it again.
Brett Green < [hidden email]>, 20 Tem 2019 Cmt, 00:22 tarihinde şunu yazdı: Unfortunately, that I don't know. If you're fine with just linear interpolation, you could calculate it by hand that way, but that's the best I can suggest offhand.
By the way, please use reply all so these are sent to the mailing list too  maybe someone else will know an easy way to do this.
On Fri, Jul 19, 2019 at 5:48 PM Burak Kaymakci < [hidden email]> wrote: But what if I want an index that is not in my matrices A, and B but within the range?
Brett Green < [hidden email]>, 19 Tem 2019 Cum, 23:33 tarihinde şunu yazdı: Yes, Burak  I didn't mean calling C(A(1), B(2)) like you said. What I said was that you need to find which indices correspond to that X value. For example, if Y=9, then you would want to find out i such that B(i)=9. In your example, i=3. You can do this with e.g. "yindex = find(B==9)".
(Please excuse me for forgetting the transposition with surf indexed as C(j,i) there.)
On Fri, Jul 19, 2019 at 4:45 PM Burak Kaymakci < [hidden email]> wrote: How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.
try this
A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
h=surf(A, B, C); q=get(h) q.zdata
 DAS


On Fri, Jul 19, 2019 at 6:25 PM Burak Kaymakci < [hidden email]> wrote: Oh okay, sorry, I didn't know it is not being sent. I will do it from now on.
Thank you for the answers and the warning. :)
If I find anything, I can mail it again.
look at interp2
Brett Green < [hidden email]>, 20 Tem 2019 Cmt, 00:22 tarihinde şunu yazdı: Unfortunately, that I don't know. If you're fine with just linear interpolation, you could calculate it by hand that way, but that's the best I can suggest offhand.
By the way, please use reply all so these are sent to the mailing list too  maybe someone else will know an easy way to do this.
On Fri, Jul 19, 2019 at 5:48 PM Burak Kaymakci < [hidden email]> wrote: But what if I want an index that is not in my matrices A, and B but within the range?
Brett Green < [hidden email]>, 19 Tem 2019 Cum, 23:33 tarihinde şunu yazdı: Yes, Burak  I didn't mean calling C(A(1), B(2)) like you said. What I said was that you need to find which indices correspond to that X value. For example, if Y=9, then you would want to find out i such that B(i)=9. In your example, i=3. You can do this with e.g. "yindex = find(B==9)".
(Please excuse me for forgetting the transposition with surf indexed as C(j,i) there.)
On Fri, Jul 19, 2019 at 4:45 PM Burak Kaymakci < [hidden email]> wrote: How can I get the Z value of a given point (X, Y) on a surface plot using octavecli? I am creating a simple surface plot using the code below. I am just playing around with the functions and plots to see what I can do and understand how to use them. A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
surf(A, B, C);
What I want is to get the value of a given point (X, Y) from the surface plot I've created with the given code above. For example, on MATLAB you can get a value by hovering over a point on the plot, like in below screenshot. But on Octave when you hover over the plot you just get (X, Y) values. Actually when you use `Z1 = interp2(A, B, C, X1, Y1)`, you can get the result too, but, as far as I know, this is not getting the data from the plot.
try this
A = [1 2 3 4 5 6]; B = [7 8 9 10 11 12]; C = magic(6);
h=surf(A, B, C); q=get(h) q.zdata
 DAS
 DAS

