How solve this error (G must be the same length as X or the same length as the number of columns in X.)in box plot?

I have this code below

    function []=boxgraph_DR_total(i,Y,M1,M2,M3)  
    X1='Homogeneity';
    X2='Energy';
    X3='Entropy';
 if (i==1)
boxplot([M1 M2 M3],{'Gold','Silver','Copper'}),xlabel(X1),ylabel(Y),grid;
    elseif (i==2)
boxplot([M1 M2 M3],{'Gold','Silver','Copper'}),xlabel(X2),ylabel(Y),grid;
elseif (i==3)
boxplot([M1 M2 M3],{'Gold','Silver','Copper'}),xlabel(X3),ylabel(Y),grid;
end

M1, M2, M3 are a 50x19.

Answer 1

[KSSV]

Y is a intended Y-axes label to the obtained plot. You can keep any required string.

boxgraph_DR_total(i,'I Like MATLAB',M1,M2,M3)

[Bajdar Nour]

Dear @KSSV it did not work. gives the same erroe

[KSSV]

You have not specified the error actually.

[Bajdar Nour]

Dear @KSSV

>> boxgraph_DR(1,'Extracted features',M1,M2,M3)

   Error using boxplot>straightenX (line 967)
G must be the same length as X or the same length as the number of columns in X.
Error in boxplot (line 273)
[xDat,gDat,origRow,xlen,gexplicit,origInd,origNumXCols] = straightenX(x,g);
Error in boxgraph_DR (line 41)
boxplot([M1 M2 M3],{'Gold','Silver','Copper'}),xlabel(X1),ylabel(Y),grid;

[KSSV]

The error is not because of Y.

[Bajdar Nour]

thanks, @KSSV, could you tell me because of what?