本文整理汇总了C++中df函数的典型用法代码示例。如果您正苦于以下问题：C++ df函数的具体用法？C++ df怎么用？C++ df使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了df函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: x
void TestExprDiff::vec01() {
Variable x(4,"x");
Function f(x,x[0]+x[3]);
Function df(f,Function::DIFF);
const ExprConstant* c=dynamic_cast<const ExprConstant*>(&df.expr());
TEST_ASSERT(c);
TEST_ASSERT(c->dim.type()==Dim::ROW_VECTOR);
double _grad[][2] = {{1,1},{0,0},{0,0},{1,1}};
IntervalVector grad(4,_grad);
TEST_ASSERT(c->get_vector_value()==grad);
}
开发者ID:nicolaje，项目名称:IBEX，代码行数:13，代码来源:TestExprDiff.cpp
示例2: vector_remove
void vector_remove(vector_t *v, size_t index, void df(void *)) {
assert(v);
size_t i = index;
if (v->count <= index) {
i = v->count - 1;
}
void *to_delete = v->data[i];
if (df != NULL) {
df(to_delete);
}
size_t diff = v->count - i + 1;
memmove(v->data + i, v->data + i + 1, sizeof(void *) * diff);
v->count--;
}
开发者ID:bendst，项目名称:cu，代码行数:14，代码来源:vector.c
示例3: main
int main(int argc, char **argv)
{
// open the file passed in on the command-line
assert(argc > 1);
FILE* f = fopen(argv[1], "r");
// construct a dwarf::file
dwarf::lib::file df(fileno(f));
// encapsulate the DIEs
dwarf::encap::file def(fileno(f));
std::cout << def.ds();
}
开发者ID:antmd，项目名称:libdwarfpp，代码行数:14，代码来源:dwarfppdump.cpp
示例4: main
void main()
{
double eps, fopt, x[3], xm[3], g[3];
int itmax = 50, n = 3, it;
double f();
void df();
eps = 1e-7;
x[0] = x[1] = x[2] = 0.0;
it = bfgs(x, xm, n, &fopt, f, df, eps, itmax);
printf("iterations = %d:\nx0=%f,x1=%f,x2=%f\nfopt=%f\n", it, xm[0], xm[1],
xm[2], fopt);
df(xm, g, 3);
printf("df[0]=%f, df[1]=%f, df[2]=%f\n", g[0], g[1], g[2]);
}
开发者ID:Masshat，项目名称:C_and_CPP，代码行数:14，代码来源:bfgs0.c
示例5: fileDlg
/**
* Initialize the applet.
*
* Only called when we create a new applet. Asks the user for an URL and
* creates a .desktop file...
*/
bool LauncherApplet::init()
{
//
// Get an url...
//
KFileDialog fileDlg(0, 0, 0, 0, true);
fileDlg.exec();
_url = fileDlg.selectedURL();
if (!_url.isValid()) {
return false;
}
//
// Create a .desktop file
//
QString file = newDesktopFile(_url);
if (KDesktopFile::isDesktopFile(_url.path())) {
// Copy existing file...
KURL dest;
dest.setPath(file);
KIO::NetAccess::upload(_url.path(), dest, 0);
} else {
// Create new file...
KDesktopFile df(file);
df.writeEntry("Encoding", "UTF-8");
df.writeEntry("Type","Link");
df.writeEntry("Name", _url.prettyURL());
if (_url.isLocalFile()) {
KFileItem item( KFileItem::Unknown, KFileItem::Unknown, _url );
df.writeEntry("Icon", item.iconName() );
} else {
df.writeEntry("Icon", KMimeType::favIconForURL(_url));
}
df.writeEntry("URL", _url.url());
df.sync();
}
// Use the .desktop file as URL
_url = KURL();
_url.setPath(file);
// Update everything...
slotSettingsChanged();
return true;
}
开发者ID:BackupTheBerlios，项目名称:slicker-svn，代码行数:56，代码来源:launcherapplet.cpp
示例6: df_main
int df_main(int argc, char *argv[]) {
printf("Filesystem Size Used Free Blksize\n");
if (argc == 1) {
char s[2000];
FILE *f = fopen("/proc/mounts", "r");
while (fgets(s, 2000, f)) {
char *c, *e = s;
for (c = s; *c; c++) {
if (*c == ' ') {
e = c + 1;
break;
}
}
for (c = e; *c; c++) {
if (*c == ' ') {
*c = '\0';
break;
}
}
df(e, 0);
}
fclose(f);
} else {
int i;
for (i = 1; i < argc; i++) {
df(argv[i], 1);
}
}
exit(ok);
}
开发者ID:00zhengfu00，项目名称:platform_system_core，代码行数:37，代码来源:df.c
示例7: reset
void PlasmaThemeListModel::refresh()
{
reset();
clearThemeList();
// get all desktop themes
QStringList themes;
const QStringList &packs = QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, "plasma/desktoptheme", QStandardPaths::LocateDirectory);
foreach (const QString &ppath, packs) {
const QDir cd(ppath);
const QStringList &entries = cd.entryList(QDir::Dirs | QDir::Hidden);
foreach (const QString pack, entries) {
const QString _metadata = ppath+QLatin1Char('/')+pack+QStringLiteral("/metadata.desktop");
if ((pack != "." && pack != "..") &&
(QFile::exists(_metadata))) {
themes << _metadata;
}
}
}
foreach (const QString &theme, themes) {
int themeSepIndex = theme.lastIndexOf('/', -1);
QString themeRoot = theme.left(themeSepIndex);
int themeNameSepIndex = themeRoot.lastIndexOf('/', -1);
QString packageName = themeRoot.right(themeRoot.length() - themeNameSepIndex - 1);
KDesktopFile df(theme);
if (df.noDisplay()) {
continue;
}
QString name = df.readName();
if (name.isEmpty()) {
name = packageName;
}
const QString comment = df.readComment();
const QString author = df.desktopGroup().readEntry("X-KDE-PluginInfo-Author",QString());
const QString version = df.desktopGroup().readEntry("X-KDE-PluginInfo-Version",QString());
ThemeInfo info;
info.package = packageName;
info.description = comment;
info.author = author;
info.version = version;
info.themeRoot = themeRoot;
m_themes[name] = info;
}
开发者ID:plasma-extensions，项目名称:plasma-widget-quick-controls，代码行数:49，代码来源:plasmathemelistmodel.cpp
示例8: getAbsolute
void LuaPath::_init(std::string const &arg0,
std::string const &vrjlua_base) {
_valid = true;
_initialPath = fs::initial_path().string();
std::vector<std::string> startingPlaces;
startingPlaces.push_back(_initialPath);
if (!vrjlua_base.empty()) {
startingPlaces.push_back(getAbsolute(vrjlua_base).string());
}
if (!arg0.empty()) {
_exeDir = getAbsolute(arg0).remove_filename().string();
startingPlaces.push_back(_exeDir);
}
_root = _findFilePath(startingPlaces,
"share/vrjugglua/lua/vrjlua-init.lua");
if (!_root.empty()) {
_luaDir = (fs::path(_root) / "share/vrjugglua/lua/").string();
startingPlaces.push_back(
(fs::path(_root) / "share/vrjugglua/").string());
} else {
_root = _findFilePath(startingPlaces, "vrjlua-init.lua");
_luaDir = _root;
}
std::string sourceTreeIndicator =
(fs::path(_luaDir) / "vrjlua-sourcetreeloc.lua").string();
if (fs::exists(sourceTreeIndicator)) {
std::ifstream df(sourceTreeIndicator.c_str());
if (df.is_open()) {
std::string line;
std::getline(df, line);
boost::algorithm::trim(line);
if (!line.empty()) {
VRJLUA_MSG_START(dbgVRJLUA, MSG_STATUS)
<< "LuaPath: Presence of file " << sourceTreeIndicator
<< " indicated we are running from a build tree, "
"adding extra path hint " << line
<< VRJLUA_MSG_END(dbgVRJLUA, MSG_STATUS);
startingPlaces.push_back(line);
}
}
}
_shareDir = _findFilePath(startingPlaces,
"assets/fonts/droid-fonts/DroidSans.ttf");
_jugglerRoot = _findJuggler();
_setJugglerEnvironment();
}
开发者ID:carlsonp，项目名称:vr-jugglua，代码行数:49，代码来源:LuaPath.cpp
示例9: newton
void newton(double x,double eps){
int num=0,i;
double ax[MAX+1],dx;
ax[0]=x;
for(i=0;i<MAX;i++){
dx=-1*f(ax[i])/df(ax[i]);
ax[i+1]=ax[i]+dx;
if(fabs(dx)<eps){
num=i+1;
break;
}
}
if(num==0)printf("Over the limit of times\n");
else printf("answer is:%lf at %d times\n",ax[num],num);
}
开发者ID:HAVRM，项目名称:work，代码行数:15，代码来源:kadai6_1.c
示例10: f
void TestExprDiff::cst_grad() {
Function f("x","y","z","10*(x-y)");
Function df(f,Function::DIFF);
const ExprNode& y=df.expr();
const ExprConstant* c = dynamic_cast<const ExprConstant*>(&y);
CPPUNIT_ASSERT(c);
CPPUNIT_ASSERT(c->dim.is_vector());
IntervalVector v(3);
v[0]=Interval(10,10);
v[1]=Interval(-10,-10);
v[2]=Interval(0,0);
check(c->get_vector_value(),v);
CPPUNIT_ASSERT((c->get_vector_value()).is_superset(v));
}
开发者ID:SimonRohou，项目名称:ibex-lib，代码行数:15，代码来源:TestExprDiff.cpp
示例11: backwardRun
/* Function for passing over the network (backward pass) */
void backwardRun() {
int from[2],to[2]; // declarations of auxiliary arrays
/* Compute deltas in output layers */
for (int i = FO, j = 0; i <= LO; i++, j++) { // from first to last neuron in output layer
d(i) = (dv(j) - y(i)) * df(x(i)); // using formula to compute deltas on output layer
//printf("\nd(%d) = (dv(%d) - y(%d)) * df(x(%d))",i,j,i,i);
}
//printf("\n---------");
/* Compute deltas in first hidden layer */
from[0] = F1H; to[0] = L1H; // definitions from-to for j (from first to last in first hidden layer)
from[1] = FO; to[1] = LO; // definitions from-to for i (from first to last in second hidden layer)
deltaRun(from,to); // runs function
}
开发者ID:Sinedko，项目名称:Ball_following，代码行数:16，代码来源:backprop-1H.c
示例12: bounds
void DBARS::add_point(double z){
if(z > x.back()){
throw_exception<std::runtime_error>("z out of bounds (too large) in DBARS::add_point");
}
if(z < x[0]){
throw_exception<std::runtime_error>("z out of bounds (too small) in DBARS::add_point");
}
IT it = std::lower_bound(x.begin(), x.end(), z);
int k = it - x.begin();
x.insert(it, z);
logf.insert(logf.begin()+k, f(z));
dlogf.insert(dlogf.begin() + k, df(z));
refresh_knots();
update_cdf();
}
开发者ID:comenerv，项目名称:Boom，代码行数:15，代码来源:DoublyBoundedAdaptiveRejectionSampler.cpp
示例13: df
void IntlTestDecimalFormatSymbols::Verify(double value, const UnicodeString& pattern,
const DecimalFormatSymbols &sym, const UnicodeString& expected){
UErrorCode status = U_ZERO_ERROR;
DecimalFormat df(pattern, sym, status);
if(U_FAILURE(status)){
errln("ERROR: construction of decimal format failed - %s", u_errorName(status));
}
UnicodeString buffer;
FieldPosition pos(FieldPosition::DONT_CARE);
buffer = df.format(value, buffer, pos);
if(buffer != expected){
errln((UnicodeString)"ERROR: format() returns wrong result\n Expected " +
expected + ", Got " + buffer);
}
}
开发者ID:cyrusimap，项目名称:icu4c，代码行数:15，代码来源:tsdcfmsy.cpp
示例14: report_error
void Tn2Sampler::add_point(double z){
if(z > x.back()){
report_error("z out of bounds (too large) in Tn2Sampler::add_point");
}
if(z < x[0]){
report_error("z out of bounds (too small) in Tn2Sampler::add_point");
}
IT it = std::lower_bound(x.begin(), x.end(), z);
int k = it - x.begin();
x.insert(it, z);
logf.insert(logf.begin()+k, f(z));
dlogf.insert(dlogf.begin() + k, df(z));
refresh_knots();
update_cdf();
}
开发者ID:Hkey1，项目名称:boom，代码行数:15，代码来源:Tn2Sampler.cpp
示例15: write_bin_offset
bool write_bin_offset(const wchar_t *file, const void *buffer, int buflen, int offset)
// записывает кусок файла по текущему смещению из буфера, файл должен существовать!
// может писать в любую часть файла, в т.ч. с увеличением его первонач-го размера,
// пропущенные при этом куски заполняются нулями (если смещение больше длины файла)
{
if ( buflen < 0 || offset < 0 ) return false;
FILEopen df( file, L"r+b" ); // w+b работает не так как надо!
if ( !df ) return false;
if ( fseek(df, offset, SEEK_SET) != 0 ) return false;
int wnum = (int)fwrite( buffer, 1, buflen, df );
return wnum == buflen;
}
开发者ID:vadimrm，项目名称:Dichotic-Harmony-Files-Converter，代码行数:15，代码来源:files.cpp
示例16: df
bool df(int v,int col)
{
if(!c[v])
{
c[v]=col;
if(col==1)
++ans;
for(int i=1;i<=n;++i)
if(p[v][i] && !df(i,(col==1?2:1)))
return 0;
}
else if(c[v]!=col)
return 0;
return 1;
}
开发者ID:Shenjiaqi，项目名称:sgu，代码行数:15，代码来源:172.cpp
示例17: QVERIFY
void KDesktopFileTest::testRead()
{
const QString fileName = QFile::decodeName(KDESRCDIR "/../services/kplugininfo.desktop");
QVERIFY(QFile::exists(fileName));
QVERIFY(KDesktopFile::isDesktopFile(fileName));
KDesktopFile df(fileName);
QCOMPARE(df.readType(), QString::fromLatin1("ServiceType"));
QCOMPARE(df.readIcon(), QString());
QCOMPARE(df.readName(), QString::fromLatin1("KDE Plugin Information"));
QCOMPARE(df.hasLinkType(), false);
QCOMPARE(df.hasMimeTypeType(), false);
QCOMPARE(df.hasApplicationType(), false);
QCOMPARE(df.fileName(), KStandardDirs::realFilePath(fileName));
QCOMPARE(df.resource(), "xdgdata-apps"); // default for .desktop files
}
开发者ID:fluxer，项目名称:kdelibs，代码行数:15，代码来源:kdesktopfiletest.cpp
示例18: it
void ToolsConfigWidget::fillListBox(QListBox *lb, const QDict<ToolsConfigEntry> &entryDict)
{
lb->clear();
QDictIterator<ToolsConfigEntry> it(entryDict);
for (; it.current(); ++it) {
ToolsConfigEntry *entry = it.current();
if (entry->isdesktopfile) {
KDesktopFile df(entry->cmdline);
lb->insertItem(SmallIcon(df.readIcon()), entry->menutext);
} else {
lb->insertItem(entry->menutext);
}
}
}
开发者ID:serghei，项目名称:kde3-kdevelop，代码行数:15，代码来源:toolsconfigwidget.cpp
示例19: df
void df(int nod)
{
lista *p;
Flag[nod] = 1;
for (p = L[nod]; p != NULL; p = p -> next)
if (!Flag[p -> nod])
{
leaga2(nod, p -> nod);
Tata[p -> nod] = nod;
Grad[nod]++;
df(p -> nod);
}
Flag[nod] = 0;
}
开发者ID:kirankum，项目名称:morbidel-timus，代码行数:16，代码来源:Copy+of+j.cpp
示例20: df
void polynomialBasis::df(const fullMatrix<double> &coord,
fullMatrix<double> &dfm) const
{
double dfv[1256][3];
dfm.resize(coord.size1() * 3, coefficients.size1(), false);
int dimCoord = coord.size2();
for(int iPoint = 0; iPoint < coord.size1(); iPoint++) {
df(coord(iPoint, 0), dimCoord > 1 ? coord(iPoint, 1) : 0.,
dimCoord > 2 ? coord(iPoint, 2) : 0., dfv);
for(int i = 0; i < coefficients.size1(); i++) {
dfm(iPoint * 3 + 0, i) = dfv[i][0];
dfm(iPoint * 3 + 1, i) = dfv[i][1];
dfm(iPoint * 3 + 2, i) = dfv[i][2];
}
}
}
开发者ID:live-clones，项目名称:gmsh，代码行数:16，代码来源:polynomialBasis.cpp
注：本文中的df函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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