# binary operators not implemented for 'cell' by 'scalar' operations

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## binary operators not implemented for 'cell' by 'scalar' operations

 I thought I could do matrix multiplications and the mathematical operators, but evidently I cannot.See m1 = {1 1; 2 4; 4 8; 3 6}m1 ={  [1,1] =  1  [2,1] =  2  [3,1] =  4  [4,1] =  3  [1,2] =  1  [2,2] =  4  [3,2] =  8  [4,2] =  6}>> m2 = m1.*0.2error: binary operator '.*' not implemented for 'cell' by 'scalar' operations>> m2 = m1^0.2error: binary operator '^' not implemented for 'cell' by 'scalar' operations-- Jonathan CamilleriMobile (MT): ++356 7982 7113 E-mail: [hidden email]Please consider your environmental responsibility before printing this e-mail. I usually reply to emails within 2 business days.  If it's urgent, give me a call. _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave
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## Re: binary operators not implemented for 'cell' by 'scalar' operations

 On 24/11/2015 09:56, Jonathan Camilleri wrote: > I thought I could do matrix multiplications and the mathematical > operators, but evidently I cannot. > > See > https://en.wikipedia.org/wiki/Operation_(mathematics) > https://en.wikipedia.org/wiki/Algebra> https://en.wikipedia.org/wiki/Order_of_operations> > >   m1 = {1 1; 2 4; 4 8; 3 6} > m1 = > { >    [1,1] =  1 >    [2,1] =  2 >    [3,1] =  4 >    [4,1] =  3 >    [1,2] =  1 >    [2,2] =  4 >    [3,2] =  8 >    [4,2] =  6 > }  >  >> m2 = m1.*0.2  > error: binary operator '.*' not implemented for 'cell' by 'scalar' m1 is not a Matrix. May be you were looking for octave:1> m1 = [1 1; 2 4; 4 8; 3 6] m1 =     1   1     2   4     4   8     3   6 octave:2> m2 = m1.*0.2 m2 =     0.20000   0.20000     0.40000   0.80000     0.80000   1.60000     0.60000   1.20000 _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave
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## Re: binary operators not implemented for 'cell' by 'scalar' operations

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## Re: binary operators not implemented for 'cell' by 'scalar' operations

 Am 24.11.2015 um 10:03 schrieb Jonathan Camilleri: I tried this: Read http://www.octave.org/bugs.html to learn how to submit bug reports. For information about changes from previous versions, type 'news'. >> m1 = {1 1; 2 4; 4 8; 3 6} m1 = {   [1,1] =  1   [2,1] =  2   [3,1] =  4   [4,1] =  3   [1,2] =  1   [2,2] =  4   [3,2] =  8   [4,2] =  6 } >> m2 = m1.^0.2 error: binary operator '.^' not implemented for 'cell' by 'scalar' operations >> cell2mat(m2) error: 'm2' undefined near line 1 column 10 error: evaluating argument list element number 1 >> On 24 November 2015 at 10:00, Marco Atzeri wrote: On 24/11/2015 09:56, Jonathan Camilleri wrote: I thought I could do matrix multiplications and the mathematical operators, but evidently I cannot. See https://en.wikipedia.org/wiki/Operation_(mathematics) https://en.wikipedia.org/wiki/Algebra https://en.wikipedia.org/wiki/Order_of_operations   m1 = {1 1; 2 4; 4 8; 3 6} m1 = {    [1,1] =  1    [2,1] =  2    [3,1] =  4    [4,1] =  3    [1,2] =  1    [2,2] =  4    [3,2] =  8    [4,2] =  6 } >  >> m2 = m1.*0.2 > error: binary operator '.*' not implemented for 'cell' by 'scalar' m1 is not a Matrix. May be you were looking for octave:1> m1 = [1 1; 2 4; 4 8; 3 6] m1 =    1   1    2   4    4   8    3   6 octave:2> m2 = m1.*0.2 m2 =    0.20000   0.20000    0.40000   0.80000    0.80000   1.60000    0.60000   1.20000 _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave -- Jonathan Camilleri Mobile (MT): ++356 7982 7113 E-mail: [hidden email] Please consider your environmental responsibility before printing this e-mail.   I usually reply to emails within 2 business days.  If it's urgent, give me a call. Business Services https://www.facebook.com/jonbusinessservices?ref=hl,  and, angel start-up investment opportunities available at http://slyth3.wix.com/jon-business. Donation page https://www.facebook.com/DonateToJonathan?ref=hl Vintage Malta https://www.facebook.com/VintageMalta?ref=hl  Online resume is available online at http://mt.linkedin.com/in/jonathancamilleri and shared bookmarks at  Doing business in Malta - https://www.gov.mt/en/About%20Malta/Doing%20Business%20in%20Malta/Pages/Doing-Business-in-Malta.aspx, presented by the Government of Malta. http://www.ccmalta.com/doing-business-in-malta/, presented by CC Advocates. http://www.kpmg.com/MT/en/IssuesAndInsights/Doing%20Business%20in%20Malta/Documents/KPMG%20Tax%20Report.pdf, prepared by KPMG. ```_______________________________________________ Help-octave mailing list Help -[hidden email] https://lists.gnu.org/mailman/listinfo/help-octave ``` {1 1; 2 4; 4 8; 3 6} is not the same as [1 1; 2 4; 4 8; 3 6]. For the difference see the Octave manual "cell array" and "matrix". _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave
 This would mean that it is not yet possible to plot contents of a cell but those of a matrix, this is just something that confused me.On 24 November 2015 at 10:13, karl wrote: Am 24.11.2015 um 10:03 schrieb Jonathan Camilleri: I tried this: Read http://www.octave.org/bugs.html to learn how to submit bug reports. For information about changes from previous versions, type 'news'. >> m1 = {1 1; 2 4; 4 8; 3 6} m1 = {   [1,1] =  1   [2,1] =  2   [3,1] =  4   [4,1] =  3   [1,2] =  1   [2,2] =  4   [3,2] =  8   [4,2] =  6 } >> m2 = m1.^0.2 error: binary operator '.^' not implemented for 'cell' by 'scalar' operations >> cell2mat(m2) error: 'm2' undefined near line 1 column 10 error: evaluating argument list element number 1 >> On 24 November 2015 at 10:00, Marco Atzeri wrote: On 24/11/2015 09:56, Jonathan Camilleri wrote: I thought I could do matrix multiplications and the mathematical operators, but evidently I cannot. See https://en.wikipedia.org/wiki/Operation_(mathematics) https://en.wikipedia.org/wiki/Algebra https://en.wikipedia.org/wiki/Order_of_operations   m1 = {1 1; 2 4; 4 8; 3 6} m1 = {    [1,1] =  1    [2,1] =  2    [3,1] =  4    [4,1] =  3    [1,2] =  1    [2,2] =  4    [3,2] =  8    [4,2] =  6 } >  >> m2 = m1.*0.2 > error: binary operator '.*' not implemented for 'cell' by 'scalar' m1 is not a Matrix. May be you were looking for octave:1> m1 = [1 1; 2 4; 4 8; 3 6] m1 =    1   1    2   4    4   8    3   6 octave:2> m2 = m1.*0.2 m2 =    0.20000   0.20000    0.40000   0.80000    0.80000   1.60000    0.60000   1.20000 _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave -- Jonathan Camilleri Mobile (MT): ++356 7982 7113 E-mail: [hidden email] Please consider your environmental responsibility before printing this e-mail.   I usually reply to emails within 2 business days.  If it's urgent, give me a call. Business Services https://www.facebook.com/jonbusinessservices?ref=hl,  and, angel start-up investment opportunities available at http://slyth3.wix.com/jon-business. Donation page https://www.facebook.com/DonateToJonathan?ref=hl Vintage Malta https://www.facebook.com/VintageMalta?ref=hl  Online resume is available online at http://mt.linkedin.com/in/jonathancamilleri and shared bookmarks at  Doing business in Malta - https://www.gov.mt/en/About%20Malta/Doing%20Business%20in%20Malta/Pages/Doing-Business-in-Malta.aspx, presented by the Government of Malta. http://www.ccmalta.com/doing-business-in-malta/, presented by CC Advocates. http://www.kpmg.com/MT/en/IssuesAndInsights/Doing%20Business%20in%20Malta/Documents/KPMG%20Tax%20Report.pdf, prepared by KPMG. ```_______________________________________________ Help-octave mailing list Help -[hidden email] https://lists.gnu.org/mailman/listinfo/help-octave ``` {1 1; 2 4; 4 8; 3 6} is not the same as [1 1; 2 4; 4 8; 3 6]. For the difference see the Octave manual "cell array" and "matrix". _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave -- Jonathan CamilleriMobile (MT): ++356 7982 7113 E-mail: [hidden email]Please consider your environmental responsibility before printing this e-mail. I usually reply to emails within 2 business days.  If it's urgent, give me a call.Business Services https://www.facebook.com/jonbusinessservices?ref=hl, and, angel start-up investment opportunities available at http://slyth3.wix.com/jon-business.Donation page https://www.facebook.com/DonateToJonathan?ref=hlVintage Malta https://www.facebook.com/VintageMalta?ref=hl Online resume is available online at http://mt.linkedin.com/in/jonathancamilleri and shared bookmarks at Doing business in Malta - https://www.gov.mt/en/About%20Malta/Doing%20Business%20in%20Malta/Pages/Doing-Business-in-Malta.aspx, presented by the Government of Malta.http://www.ccmalta.com/doing-business-in-malta/, presented by CC Advocates. _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave
 On Tue, Nov 24, 2015 at 4:31 AM, Jonathan Camilleri wrote:This would mean that it is not yet possible to plot contents of a cell but those of a matrix, this is just something that confused me.On 24 November 2015 at 10:13, karl wrote: Am 24.11.2015 um 10:03 schrieb Jonathan Camilleri: I tried this: Read http://www.octave.org/bugs.html to learn how to submit bug reports. For information about changes from previous versions, type 'news'. >> m1 = {1 1; 2 4; 4 8; 3 6} m1 = {   [1,1] =  1   [2,1] =  2   [3,1] =  4   [4,1] =  3   [1,2] =  1   [2,2] =  4   [3,2] =  8   [4,2] =  6 } >> m2 = m1.^0.2 error: binary operator '.^' not implemented for 'cell' by 'scalar' operations >> cell2mat(m2) error: 'm2' undefined near line 1 column 10 error: evaluating argument list element number 1 >> On 24 November 2015 at 10:00, Marco Atzeri wrote: On 24/11/2015 09:56, Jonathan Camilleri wrote: I thought I could do matrix multiplications and the mathematical operators, but evidently I cannot. See https://en.wikipedia.org/wiki/Operation_(mathematics) https://en.wikipedia.org/wiki/Algebra https://en.wikipedia.org/wiki/Order_of_operations   m1 = {1 1; 2 4; 4 8; 3 6} m1 = {    [1,1] =  1    [2,1] =  2    [3,1] =  4    [4,1] =  3    [1,2] =  1    [2,2] =  4    [3,2] =  8    [4,2] =  6 } >  >> m2 = m1.*0.2 > error: binary operator '.*' not implemented for 'cell' by 'scalar' m1 is not a Matrix. May be you were looking for octave:1> m1 = [1 1; 2 4; 4 8; 3 6] m1 =    1   1    2   4    4   8    3   6 octave:2> m2 = m1.*0.2 m2 =    0.20000   0.20000    0.40000   0.80000    0.80000   1.60000    0.60000   1.20000 _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave -- Jonathan Camilleri Mobile (MT): ++356 7982 7113 E-mail: [hidden email] Please consider your environmental responsibility before printing this e-mail.   I usually reply to emails within 2 business days.  If it's urgent, give me a call. Business Services https://www.facebook.com/jonbusinessservices?ref=hl,  and, angel start-up investment opportunities available at http://slyth3.wix.com/jon-business. Donation page https://www.facebook.com/DonateToJonathan?ref=hl Vintage Malta https://www.facebook.com/VintageMalta?ref=hl  Online resume is available online at http://mt.linkedin.com/in/jonathancamilleri and shared bookmarks at  Doing business in Malta - https://www.gov.mt/en/About%20Malta/Doing%20Business%20in%20Malta/Pages/Doing-Business-in-Malta.aspx, presented by the Government of Malta. http://www.ccmalta.com/doing-business-in-malta/, presented by CC Advocates. http://www.kpmg.com/MT/en/IssuesAndInsights/Doing%20Business%20in%20Malta/Documents/KPMG%20Tax%20Report.pdf, prepared by KPMG. ```_______________________________________________ Help-octave mailing list Help -[hidden email] https://lists.gnu.org/mailman/listinfo/help-octave ``` {1 1; 2 4; 4 8; 3 6} is not the same as [1 1; 2 4; 4 8; 3 6]. For the difference see the Octave manual "cell array" and "matrix". _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave -- Jonathan CamilleriA cell and a matrix/array are entirely different things. A cell can hold things other than numbers. A matrix can only hold numbers. A cell can also have different size elements, a matrix must be nD rectangular.  Because a cell in not necessarily numbers, there is no clear definition on what standard matrix operators would or should do. your cell2mat attempt didn't work because you tried to run the function on m2 which didn't exist. when the error occurred, m2 was never created. so cell2mat(m2) threw an expected error. Had you tried >> cell2mat(m1)ans =   1   1   2   4   4   8   3   6>> m2 = ans.^2m2 =    1    1    4   16   16   64    9   36things would have been fine. Is there a particular reason you're working with a cell array instead of a numerical array/matrix?  If you need to operate on the elements of a cell, there is the 'cellfun' command, but that's only for working on the elements individually. Nick J. _______________________________________________ Help-octave mailing list [hidden email] https://lists.gnu.org/mailman/listinfo/help-octave