Problem with vl_nnaxpy?

[LavieLuo]

This problem occurs when implementing the backward of SE-RestNet-50 in 'Axpy Layer'.

#--------------------------------------------------
dagnn.Layer/backwardAdvanced (line 124)
Invalid derivatives returned by layer "conv5_3".
#--------------------------------------------------

Part of the dagnn.Layer code:
[derInputs, derParams] = obj.backward ... (inputs, {net.params(par).value}, derOutputs) ; if ~iscell(derInputs) || numel(derInputs) ~= numel(in) error('Invalid derivatives returned by layer "%s".', layer.name); end

I checked the 'class' and 'numel' of [derInputs], it looks like the them are 'single' and '1' respectively.

Thus, I run
vl_contrib('test', 'mcnExtraLayers') ;

Same problem appears here,
#---------------------------------------------------------------------------------
Error nnaxpy/basic (line 15)
test.der(@(a) vl_nnaxpy(a, x1, x2), a, dzdy, dzdx{1}, 1e-3*test.range) ;
#---------------------------------------------------------------------------------
'dzdx' is not a 'cell', but a 'single';

Though I try to compel the output of [fun vl_nnaxpy] to be a cell by
y={y}

There is another problem that
#----------------------------------------------------------------------------------
Error nnaxpy/basic (line 16)
test.der(@(x1) vl_nnaxpy(a, x1, x2), x1, dzdy, dzdx{2}, 1e-4*test.range) ;
#----------------------------------------------------------------------------------
It looks like <size(dzdx) = 1>, and dzdx{2} beyond the index.

Could you help me? Thanks!

[sunzhen6251]

This problem occurs when implementing the backward of SE-RestNet-50 in 'Axpy Layer'.

#--------------------------------------------------
dagnn.Layer/backwardAdvanced (line 124)
Invalid derivatives returned by layer "conv5_3".
#--------------------------------------------------

Part of the dagnn.Layer code:
[derInputs, derParams] = obj.backward ... (inputs, {net.params(par).value}, derOutputs) ; if ~iscell(derInputs) || numel(derInputs) ~= numel(in) error('Invalid derivatives returned by layer "%s".', layer.name); end

I checked the 'class' and 'numel' of [derInputs], it looks like the them are 'single' and '1' respectively.

Thus, I run
vl_contrib('test', 'mcnExtraLayers') ;

Same problem appears here,
#---------------------------------------------------------------------------------
Error nnaxpy/basic (line 15)
test.der(@(a) vl_nnaxpy(a, x1, x2), a, dzdy, dzdx{1}, 1e-3*test.range) ;
#---------------------------------------------------------------------------------
'dzdx' is not a 'cell', but a 'single';

Though I try to compel the output of [fun vl_nnaxpy] to be a cell by
y={y}

There is another problem that
#----------------------------------------------------------------------------------
Error nnaxpy/basic (line 16)
test.der(@(x1) vl_nnaxpy(a, x1, x2), x1, dzdy, dzdx{2}, 1e-4*test.range) ;
#----------------------------------------------------------------------------------
It looks like <size(dzdx) = 1>, and dzdx{2} beyond the index.

Could you help me? Thanks!

I also encountered this problem. Have you solved it ?

[LavieLuo]

@sunzhen6251
Not yet....
I can't handle this and then use pytorch instead of it.

[sunzhen6251]

@sunzhen6251
Not yet....
I can't handle this and then use pytorch instead of it.

OK...Thank you anyway... : )