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   function [B1] = bpsl2(a,b,n,x,l,h,x0,B,B1)

 a=-5;b=5;

n=10;

x=-5:0.5:5;

l=1;

x0=a;

h=(b-a)/n;

t=1./h;

g=length(x);

B1=zeros(n+1,g);

    for i=1:g

    B=zeros(1,n+1);

for j=1:n+1

    if x(i)>=x0 && x(i)<(x0+h)

        B(j)=t*(x(i)-x0);

    elseif x(i)>=(x0+h)&& x(i)<=(x0+2*h)

            B(j)=t*((x0+2*h)-x(i));

        else B(j)=0;

    end

        if j==1;

            x0=x0;

        else

        x0=x0+h;

        end

end

B1(:,i)=B';

    end

   function [B1] = bpsl2(a,b,n,x,l,h,x0,B,B1)

 a=-5;b=5;

n=10;

x=-5:0.5:5;

l=1;

x0=a;

h=(b-a)/n;

t=1./h;

g=length(x);

B1=zeros(n+1,g);

    for i=1:g

    B=zeros(1,n+1);

for j=1:n+1

    if x(i)>=x0 && x(i)<(x0+h)

        B(j)=t*(x(i)-x0);

    elseif x(i)>=(x0+h)&& x(i)<=(x0+2*h)

            B(j)=t*((x0+2*h)-x(i));

        else B(j)=0;

    end

        if j==1;

            x0=x0;

        else

        x0=x0+h;

        end

end

B1(:,i)=B';

    end

   function [B1] = bpsl2(a,b,n,x,l,h,x0,B,B1)

 a=-5;b=5;

n=10;

x=-5:0.5:5;

l=1;

x0=a;

h=(b-a)/n;

t=1./h;

g=length(x);

B1=zeros(n+1,g);

    for i=1:g

    B=zeros(1,n+1);

for j=1:n+1

    if x(i)>=x0 && x(i)<(x0+h)

        B(j)=t*(x(i)-x0);

    elseif x(i)>=(x0+h)&& x(i)<=(x0+2*h)

            B(j)=t*((x0+2*h)-x(i));

        else B(j)=0;

    end

        if j==1;

            x0=x0;

        else

        x0=x0+h;

        end

end

B1(:,i)=B';

    end

   function [B1] = bpsl2(a,b,n,x,l,h,x0,B,B1)

 a=-5;b=5;

n=10;

x=-5:0.5:5;

l=1;

x0=a;

h=(b-a)/n;

t=1./h;

g=length(x);

B1=zeros(n+1,g);

    for i=1:g

    B=zeros(1,n+1);

for j=1:n+1

    if x(i)>=x0 && x(i)<(x0+h)

        B(j)=t*(x(i)-x0);

    elseif x(i)>=(x0+h)&& x(i)<=(x0+2*h)

            B(j)=t*((x0+2*h)-x(i));

        else B(j)=0;

    end

        if j==1;

            x0=x0;

        else

        x0=x0+h;

        end

end

B1(:,i)=B';

    end

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